How to choose fruits and vegetables?

1, how to identify the freshness of vegetables?

Pay attention to the following points when choosing vegetables:

(1) Don't buy vegetables with abnormal colors. Fresh vegetables are not as bright as possible. For example, when buying cherry radish, check whether the radish fades. Be careful when you find that the color of dried bean curd is brighter than others.

(2) Don't buy vegetables with abnormal shapes. Stale vegetables have wilting, dryness, injury, twisted lesions and other abnormal forms; Some vegetables will grow deformed because of the use of hormones.

(3) Don't buy vegetables with bad smell. In order to make some vegetables look better, illegal traders soak them with chemical reagents, such as sulfur and nitrate. These substances have an odor and are not easy to wash off.

2. What dishes should I eat in what season?

Pay attention to the season when eating vegetables, and eat whatever vegetables are popular in each season.

Listed below is the growth of vegetables every month.

return

65438+ 10 month: green vegetables, Chinese cabbage, spinach, celery, radish, arrowhead, etc.

February: green vegetables, Chinese cabbage, spinach, celery, vegetable tips, etc.

March: green vegetables, spinach, celery, vegetable tips, cauliflower, leeks, etc.

April: green vegetables, lettuce, chicken feathers, celery, vegetable tips, cauliflower, etc.

May: Green vegetables, Chinese cabbage, lettuce, chicken feathers, cucumbers, broad beans, water bamboo, tomatoes and so on.

June: Chinese cabbage, cucumber, tomato, potato, chickpea, kidney bean (kidney bean), eggplant, pumpkin, etc.

July: cowpea, eggplant, chickpea, cabbage, wax gourd, loofah, edamame, pepper, potato, lentil, cabbage, water spinach, etc.

August: winter melon, cowpea, eggplant, green vegetables, chickpeas, pumpkins, loofah, edamame, peppers, potatoes, lentils, Chinese cabbage and water spinach.

September: green vegetables, wax gourd, radish, loofah, edamame, cowpea, eggplant, pepper, taro, water bamboo, cabbage, lentils, etc.

65438+ 10 month: green vegetables, Chinese cabbage, spinach, celery, radish, taro, water bamboo, cauliflower, chrysanthemum, lettuce, melon, etc.

165438+1October: green vegetables, Chinese cabbage, spinach, celery, radish, lettuce, cauliflower, shepherd's purse, grass head, lettuce, arrowhead, green garlic, etc.

65438+February: green vegetables, Chinese cabbage, Chinese cabbage, celery, radish, boiled vegetables, shepherd's purse, arrowhead, cauliflower, etc.

Some people may suggest that greenhouse cultivation has been promoted now, and the seasonal restriction has broken through. However, we should see that the seasonality of vegetable production still exists, but it is advanced and delayed. The phrase "eat when cooked" is still the consumer's experience of vegetable consumption.

3. How to buy eggplant?

There are two kinds of eggplant in the vegetable market: purple and reddish. Purple is eggplant, and red is eggplant. In spring, red eggplant will be listed first, and then purple eggplant will be listed.

return

The tenderness of eggplant has a great influence on the quality. A reliable way to judge whether an eggplant is old or tender is to look at the size of its eyes. Where do the eyes of eggplant grow? Where the sepals of eggplant are connected with the fruit, there is a white band-shaped ring, which is slightly green. Vegetable farmers call it the "eyes" of eggplant. The bigger the eyes, the more tender the eggplant; The smaller the eyes, the older the eggplant.

Everyone wants to buy tender eggplant, and choose the one with big eyes. At the same time, tender eggplant has a sticky feeling, and hard eggplant is old eggplant. Bright appearance means high freshness, while shriveled skin and dull luster mean stale. The best edible period of eggplant is May and June.

4. How to buy peppers?

There are only three kinds of peppers in the vegetable market. One is pepper, the other is sweet pepper with heavy sweetness and no spicy taste, and the other is semi-spicy pepper in between. Generally speaking, the fruit shape of pepper has obvious correlation with its spicy sweetness. Pepper is much more spicy, and the finer the pulp, the more spicy it is. Persimmon-shaped round peppers are mostly sweet peppers, and the thicker the pulp, the sweeter and more brittle it is. Semi-spicy pepper is in between. If you pay more attention to nutrition, you can buy red pepper to eat, because red pepper has 0.8 times more vitamin C and 3 times more carotene than green pepper, and red pepper is light in weight (small in proportion), which is more economical, but not as crisp as green pepper.

5. How to buy tomatoes?

There are two main kinds of tomatoes in the vegetable market. One is red tomato, which has high sugar and acid content and heavy taste; The other is pink tomato, which has low sugar and acid content and light taste. When you buy tomatoes in the market, you must first find out whether you plan to eat them raw or cooked. If you want to eat it raw, of course, buy pink, because this tomato has a faint sour taste, and it is better to eat it raw; If you want to eat well, try to buy red tomatoes. This kind of tomato has a strong flavor and is good for making soup and cooking. Fruit shape is closely related to pulp: oblate pulp is fine and round pulp is thick. In particular, don't buy green tomatoes and "green-shouldered" (blue-stemmed) tomatoes, because these tomatoes are poor in nutrition and contain toxic lycopene. Also, don't buy tomatoes with uneven colors and painted faces. Because this is a fruit infected with tomato virus disease, its taste and nutrition are poor.

6. How to buy yam?

return

Yam in vegetable market is mainly long column, produced in Shaanxi, Henan, Shandong, Hebei and other places. No matter what variety you buy, the skin of tuber is the focus of selection. Only when the skin is smooth and free from abnormal spots can you buy with confidence. Do not buy if you find abnormal spots. Because, as long as there are any abnormal spots on the epidermis, it tells us that it has been infected with diseases and its edible value has decreased.

7. How to buy kidney beans?

Kidney bean is commonly known as sword bean in Shanghai. Canadian clams can be divided into two types according to their growth habits: one is Canadian clams with tendrils, which, like cowpeas, climb vines and need to be cultivated in scaffolding; The second is dwarf sword bean, which stands upright like edamame. These two kinds of sword beans have different tastes. The rattan sword bean is glutinous and tastes good; Dwarf sword bean, japonica rice, not as good as tendril sword bean. However, how to distinguish these two kinds of sword beans in the market? Generally speaking, look at two First, the pod length is different, the dwarf pod is longer and the tendril pod is shorter; Second, the shapes of pods are different: short pods are long and slender, and tendrils are short.

8. How to buy lentils?

There are many varieties of lentils in Shanghai market, most of which are tender and edible. Only red pods (such as pig blood flat) can be used as both pods and grains, and puffed grains are delicious. Green pods and beans with red edges of green pods are better to eat with tender pods, and you can't buy bulging ones.

9. How to buy cucumbers?

There are many varieties of cucumbers in the vegetable market, but there are basically three kinds: one is a thorn-free species. It is a cucumber variety introduced from abroad, which is light green in color, crisp to eat and rich in water. Second, there are fewer thorns. The fruit has smooth surface, less thorns (black thorns), thin skin and thick flesh, and more water. Delicious and sweet. The third is the species with dense thorns, which are mostly white thorns, green, thick skin, crisp mouth and strong fragrance.

The three kinds of cucumbers mentioned above taste different when eaten raw. Simply put, the varieties without thorns are light, the varieties with fewer thorns are fresh, and the varieties with dense thorns are fragrant. No matter what kind, it is undoubtedly necessary to choose a tender one, preferably one with flowers (the corolla stays in the navel). At the same time, any variety must be hard. Because the water content of cucumber is as high as 96.2%, the melon strips are always hard after harvesting and will become soft after losing water. Therefore, soft cucumbers will definitely lose their freshness. But hard is not necessarily fresh. Because soaking softened cucumbers in water will rehydrate and harden. It's just that the navel of the melon is still a little soft, the surface of the melon is dull, and most of the remaining corollas no longer exist. It is easy for consumers to identify when they buy.

10, how to buy wax gourd?

There are three kinds of wax gourd in the vegetable market: green, black and white. Black-skinned wax gourd has thick meat and high edible rate; White-skinned winter melon skin is thin, loose and easy to taste; Cucumber is somewhere in between. It is better for citizens to buy black melons. This kind of wax gourd is shaped like a cannonball (long stick). Choose the kind with well-proportioned melon strips and no hot spots (sunburn). Long strips of meat are thick and have little pulp. So the eating rate is high. It is especially important to press the pulp of melon with your fingers and buy dense meat, because this kind of melon tastes good; Soft meat turns into "a bubble of water" after it is cooked, and it tastes bad.

The best consumption period is the midsummer season in July and August. Although wax gourd is resistant to storage, its edible quality is still fresh.

1 1, how to buy radish?

Radish is called white radish in Shanghai market. From the perspective of vegetable commodity science, radish can be divided into three types: long radish, round radish and small carrot. No matter what kind of radish, the root shape is round and the skin is smooth. Generally speaking, people with smooth skin tend to have fine meat, so smooth skin is the first rule. The second one is heavy, heavy in weight and heavy in hand. If you master this rule, you can avoid buying hollow radish (bran radish, chrysanthemum heart meat). Third, the skin color is normal. The "oily" skin color (translucent patches) not only shows that it is not fresh, but sometimes it may even be frozen (severely frozen radish is easy to identify after thawing), and this radish basically loses its edible value. Fourth, you can't be greedy when buying radishes. The best policy is medium and small. This kind of white radish is compact and full, burnt into powder, soft and waxy, and tastes good.

How to buy spinach?

There are two kinds of spinach in the vegetable market: one is lobular and the other is big leaf. No matter what kind, the petiole is short, the red root is small and the leaves are dark green. However, in winter, the leaves are red, indicating that they taste softer and sweeter after being tempered by frost. The consumption of spinach has a strong seasonality. From 10 to April of the following year, spinach is on the market for half a year, with astringent taste (high oxalic acid content) in early autumn and bolting in late spring. Generally speaking, winter solstice (65438+late February) to beginning of spring (early February) is the best edible period. Sometimes you will see yellow spots on spinach leaves and gray hairs on the back of the leaves, indicating that it is infected with downy mildew. Of course, choose the one that is not sick.

13, how to buy Chinese cabbage (vegetable tip)?

There are three kinds of vegetable markets, namely pickles with dark leaves and tips, which can be harvested after the main flower bud is harvested, and will be listed in February 2- 10/0, 18. Second, the vegetables are sharp, the leaves are pale, and now the buds are harvested and no flowers can be seen. It's best to buy a medium size, finger thickness, not hollow. Listed in February and March. There is also a regular dish with short petioles, dense internodes, medium thick stems and no flowers and no hollowness as the top grade.

There is also a purple pedicel with purple leaves and stems, which is of high quality, but it has not been accepted by consumers and has a small cultivation area. There is also a Cantonese dish in summer, which is crisp but not glutinous, and the market sales volume is not large.

14, how to buy Artemisia selengensis (Artemisia selengensis)?

Artemisia selengensis is also called Artemisia selengensis. There are two kinds of vegetables in the market: sharp leaves and round leaves. Chrysanthemum morifolium is also called chrysanthemum morifolium or chrysanthemum morifolium, and chrysanthemum morifolium is also called chrysanthemum morifolium or chrysanthemum morifolium. Sharp-leaved seeds have small leaves, many nicks, japonica taste, but strong fragrance; The round leaves are wide and shallow, and they taste soft and waxy. It's easy to bolting in spring, so don't buy bolting. Chrysanthemum morifolium has less diseases and insect pests and less pesticide pollution, and the best edible period is 10,1,12 and March and April.

How to choose celery?

There are four kinds of celery in Shanghai market: green celery, yellow celery, white celery and beautiful celery. If you want to buy high-quality celery, you must first understand the edible quality characteristics of these four kinds of celery: green celery is rich in flavor; Huang Xin Qin has a strong taste and tender appearance; White celery is light and not crisp; Celery tastes light and crisp. No matter what kind of celery, it is not suitable to buy celery with thick green leaves. Because the leaves are "black", it means that the growing period is dry and short of water, and the growth is slow, and there are many crude fibers.

Whether celery is fresh depends mainly on whether the leaves are straight, and fresh celery is straight. Celery stored for a long time, the tip of the leaf will tilt, the leaves will become soft, and even yellow and rust.

16, how to buy winter bamboo shoots?

When I bought winter bamboo shoots, I found that their shells were open and upturned, and they smelled of sulfur, indicating that they might have been smoked with sulfur. If it is a fresh winter bamboo shoot, its shell is tightly wrapped.

How to buy ginger?

When buying ginger, you must see if it has been "beautified" by sulfur. Once the ginger is smoked and baked by sulfur, its appearance is yellowish, it looks white and tender, and its skin has fallen off. However, industrial sulfur contains harmful substances such as lead, sulfur and arsenic. Attached to ginger during smoking, it will cause harm to human respiratory tract and even directly infringe on liver and kidney after eating.

18, how to buy chicken hair vegetables?

Chickpea is a green vegetable with the shortest growth period in the market. In high temperature season, it can be harvested about 20 days after sowing. There are two requirements for buying chicken hair vegetables. One is freshness, that is, high freshness. Chickpeas are tender and are the easiest to lose water and shrink. Once the water is lost and sprayed again, the dead tip of mature leaves cannot be recovered. So, don't buy anything with wilting tips. Water drops on the blade indicate the highest freshness. The second kind is tender, that is, don't buy old, dark and tender. The petiole with long growth period is also long, generally speaking, it is better to be short (the length should not exceed 15 cm).

How to buy food?

The quality of green vegetables mainly depends on two aspects: one is the height of vegetable plants, that is, the length of leaves. In production, long leaves are called long leaves and short leaves are called short leaves. Dwarf glutinous rice has good quality and soft and waxy taste; The quality of the wine is poor, and there are many fibers, so it is not delicious. The second is to look at the depth of leaf color. Light green leaves are called "white leaves" and dark green leaves are called "black leaves". White-leaf varieties have good quality, while black-leaf varieties have poor quality. In addition, green vegetables can also be divided into green stems and white stems. Petiole with light green color is called green handle, and petiole with approximate white color is called white handle. The difference between them is that the white stalk is light and the green stalk is thick.

20. How to buy shepherd's purse?

There are two kinds of shepherd's purse in the vegetable market. One is a sharp-leaved species, namely shepherd's purse, with light leaves, small and thin leaves, strong taste and japonica nature; The other is round leaf species, that is, shepherd's purse with thick leaves and large and thick leaves. The taste is light and waxy. 1 1, 12, 1 and February are the best consumption periods.

It's best to plant a tree in the market. The rolled trees are of poor quality. Do not abandon the red leaves. Red leaves are more fragrant and taste better.

2 1, how to buy amaranth?

Amaranth is called rice amaranth in Shanghai. There are three kinds of amaranth: red amaranth, green amaranth and colored amaranth. Amaranth leaves are purple and soft to eat; The leaves of amaranth are green, which is very unpalatable. Color amaranth, also known as Guanyin rice amaranth, is purplish red near the veins, with green leaves and soft and waxy taste. Generally speaking, the leaves are thick and wrinkled, thin and flat, and they taste tender. Holding amaranth when you buy it, it feels soft and tender, but hard and old. May and June are the best time to eat it.

22. How to buy leeks?

(1) Do you know how many kinds of leeks there are?

There are four kinds of leeks, besides leaf leeks, there are root leeks (mainly produced in Yunnan and eaten with fleshy roots), flower leeks (mainly eating flowers) and mosaic leeks. A large number of leeks are on the market, and so are leeks.

(2) Is leek wide or narrow?

According to the width of leek leaves, there are broad-leaved leeks and narrow-leaved leeks. Leek with broad leaves, tender meat and faint fragrance; The sales volume of narrow-leaf leek is not as good as that of wide-leaf leek, but it is rich in flavor. People who really like to eat leeks should choose leeks with narrow leaves as their first choice. It should be noted that leeks with unusually wide leaves should be purchased with caution, because growth stimulators (synthetic plant hormones) may be used during cultivation.

(3) How to identify the freshness of Chinese chives?

The leaves of leek are composed of leaves and leaf sheaths. The leaf sheath surrounds and forms a "false stem". When you cut leeks, you cut fake stems near the ground. When just cut, the incision at the "false stem" is even, indicating freshness; If you cut it for a few days, the incision will be uneven and show an inverted pagoda shape. This is because the young leaves in the center grow fast, while the old leaves in the outer layer grow slowly after harvesting, thus forming an inverted pagoda-shaped incision.

23. How to buy cauliflower?

(1) What kind of cauliflower do you want?

When buying cauliflower, there are two main points: first, the maturity of the flower ball, and it is best to stick around the flower ball; The second is the whiteness of the flower ball, which is yellow in white and colorless and hairless.

(2) Why not use a knife to cut the flower ball before cooking cauliflower?

Because if you cut the flower ball with a knife, it will cause the flower ball to break and scatter, which will affect the impression and taste.

24. How to buy cabbage?

There are 5438+0, 2, 3 and 4-month sharp cabbages in late autumn in June, flat-topped spring cabbages (yellow seedling system) in April and May, summer cabbages in July and August, early-maturing cabbages in September 10, June 12.

No matter what season and variety, the standard of purchasing cabbage is the same: the leaves should be hard and important, and the loose ones should not be wrapped tightly, so don't buy them (the sharp cabbage is fresh, but it doesn't matter if it is loose). The leaf ball is solid, but the top is convex, indicating that the ball begins to pick, the middle column is too high, and the edible flavor becomes worse. Don't buy it either.

Cabbage is a calcium-sensitive vegetable. Frequent calcium deficiency. The symptom is that the leaf edge is dead (vegetable farmers call it golden edge). This is a physiological disease and does not affect the quality of eating. Just cut off the dead leaves when you eat them.

25. How to identify "chemical bean sprouts"?

The bean sprouts promoted by chemical fertilizers or herbicides grow fast and well, and the fibrous roots do not grow. Not only does it not have a tender and crisp taste, but the residual fertilizer will generate ammonia nitrite under the action of microorganisms, which is in danger of inducing esophageal cancer and gastric cancer. When you buy bean sprouts, you should smell them for ammonia first, and then look for fibrous roots. If you find that they have ammonia and no roots, don't buy and eat them.

26. How to keep vegetables fresh?

The easiest way is to use old newspapers, spray some water on the leaves, then wrap them in newspapers and put the stems upright in the refrigerator, which can effectively prolong the storage time and keep them fresh.

27. How to eat green vegetables is more nutritious?

Green vegetables are rich in vitamins, cellulose and trace elements, which are closely related to human health. If you want to fully absorb the nutrients in green vegetables, you should pay attention to the following points:

(1) Try to eat raw vegetables.

Vegetables can be cooked without heating, so many vitamins will not be destroyed and lost. Such as: radish, cucumber, sweet potato, bell pepper, celery, etc. Can be eaten raw, so that you can taste natural delicacies, and vitamin C is not destroyed. But you should pay attention to hygiene when eating raw vegetables.

(2) Eat vegetables first when eating.

When people are hungry, their appetite is particularly strong. Facing a table of delicious food, they should eat vegetables first. Because vegetables are one of the important dishes to maintain the nutritional balance of the body, especially people who don't like fruits should pay more attention to this way of eating.

(3) If it needs to be cooked thoroughly, it must be burned thoroughly.

For example, lentils and sword beans all have certain bean toxins. If it is not cooked, the toxin is not destroyed, and poisoning accidents are prone to occur when eating.

(4) Try not to add seasoning when eating.

The best way to eat green vegetables is to quickly scald them with boiling water, try not to add seasoning, try to be light and taste natural.

(5) Don't drink vegetable juice as the main course.

Drinking vegetable juice will affect the secretion of digestive enzymes in saliva.

Because the function of chewing is not only to chew vegetables, but more importantly, to fully mix digestive enzymes contained in saliva into juice through chewing, and vegetable juice can only be used as auxiliary food and drink.

28, cold salad, hot fried taste strange to stop eating immediately.

Everyone may encounter their own cold cucumber, tomato, or hot-fried vegetables with bitter taste, so it is very likely that vegetables contain high pesticide residues or hormones for unknown reasons. Stop eating immediately at this time to prevent poisoning accidents.

29. Which vegetables are susceptible to pesticide pollution in different seasons?

Generally speaking, eggplant, fruits and melons produced in early spring have many diseases, and the use of fungicides is more common. Eggplants, melons and beans are harvested continuously, and the growth period is long. Therefore, it is the characteristic of producing this kind of vegetables to control pests and diseases while using pesticides. Because there are many kinds of pests that occur in autumn and have strong drug resistance, more pesticides are used. The pesticide residue pollution of loose leaf vegetables is more serious than that of cabbage leaf vegetables. Therefore, you can buy green leafy vegetables in winter and spring, and eggplant, melon and cabbage leafy vegetables in autumn. Especially in summer, it is safer to change consumption habits and buy more leafy vegetables such as cabbage. Because the growth process of Chinese cabbage is from the outside to the inside, if pesticides are sprayed on the old leaves, the old leaves have been removed during harvesting, so it is safer.

30. scientifically wash vegetables to remove pesticide residues?

Pesticide residues are harmful to health. Pesticides have two parts: one is hydrophilic and the other is lipophilic. General cleaning can only remove some hydrophilic pesticide residues, and some lipophilic pesticide residues will not be washed away by water. Therefore, when cleaning vegetables, add one or two drops of edible detergent and soak for three to five minutes, which is 1-2 times more than clear water, so as to remove the pesticide residues in the lipophilic part. The vegetables washed in this way can almost completely wash away pesticide residues, which is beneficial to health.

3 1. How to keep fruits fresh?

After buying fresh fruit, wrap it in paper to prevent water evaporation; Keep it in a cool place, avoid sunlight and keep a certain temperature. In addition, it is best to use a storage method close to zero degrees Celsius, but it is not good if the temperature is too low, especially for tropical fruits.

32. How to choose strawberries?

Strawberry fruit is bright red in color, sweet and sour, with special fragrance, especially rich in vitamin C, which is deeply loved by people. Select strawberry 1. The first thing to look at is the variety of strawberries. At present, most strawberries on the market are Fengxiang, and a few are Qingtun No.1, with high sugar content and rich fragrance. There are also some varieties in the market, such as "Li Hong" and "Xing Xing", which have large fruits, but often have large acidity and weak fragrance. 2. The fruit should be fresh, and the surface of the fresh fruit has a rich luster, which does not break or flow. 3. From a single point of view, the whole fruit should be bright red and even, and it is not advisable to buy fruits that are not completely red or half red and half green. 4. It is found that the fruit has wormholes eaten by pests, or there are gray mold and powdery mildew spots on the surface, and there are often gray or white mold filaments in the diseased spots. Don't eat this unhealthy fruit.

33. How to tell whether strawberries use hormones?

In the process of strawberry cultivation, in order to improve the fruit setting rate, it is a technical measure to spray 1-2 times of plant growth hormone "gibberellin" at the budding stage (before flowering). Because the hormone has basically disappeared after spraying for a month, residents don't have to worry about this hormone spray. However, some fruit farmers sprayed fruit bulking agent during strawberry fruit bulking period, and hormones such as cytokinin were added in the dosage form, which did not meet the safety and hygiene requirements of agricultural products. Strawberries sprayed with fruit swelling agent often have fruit swelling, cracking and deformity. At present, it is difficult to distinguish between using hormones and not using hormones in an intuitive way. Residents must raise their awareness when buying, and it is best to buy certified strawberries.

34. How to buy watermelons?

How can I buy a red and sweet watermelon?

The key is to master the maturity of melon. Please pay attention to three points:

Look at the shape first and distinguish the skin color, pedicle and navel of the melon. Where the melon shape is correct, the skin is hard and full, the pattern is clear, the skin is slightly uneven and wavy, the pedicel and navel are tightly closed, slightly retracted, and the skin on the ground turns yellow, which is a sign of maturity;

Second, listen to the sound, you can hold the melon in one hand and flick it with your fingers in the other. Any sound, such as "knocking" or "touching" the board, is a symbol of immaturity; The sound is tired and muddy, similar to the "Bubu" sound of drums and vibrato, which is a sign of maturity;

Third, the end weight, the raw melon has more water content and the melon body is heavier; Mature melons are lighter than raw melons because their flesh is crisp and their tissues are loose. In addition, it should be noted that if the melon skin is soft and black, the knocking sound is too heavy, the melon body is too light, and even the melon body is shaken, it will rot and be inedible.

35. Is sugar cane red and inedible?

After storage for a long time, some sugarcane stems will be fleshy red. Don't eat this kind of red cane stalk, people will be poisoned if they eat too much red cane. Because the redness of sugarcane stems is caused by diseases such as fermentation or red rot and light rot during storage. Many kinds of mycotoxins are often produced in fermentation or diseases. After eating this toxin, people will have symptoms such as dizziness and vomiting, which will seriously endanger people's health, so don't eat red sugarcane stems.

36. Clinical symptoms and treatment precautions of pesticide poisoning in edible vegetables.

Acute pesticide poisoning of vegetables generally occurs within 0-2 hours after eating 65438+, and often manifests as dizziness, headache, nausea, vomiting, sweating, chest tightness, blurred vision, fatigue and other symptoms. At this time, it should be sent to a nearby hospital for emergency treatment in time, so don't delay time. If the patient has severe dyspnea on the way to the hospital, artificial respiration should be performed, and the medical history and symptoms should be truthfully reflected when he is sent to the hospital.

/shipin/open4.asp？ ArticleID=520

First, don't buy vegetables with abnormal shapes and colors. Vegetables with normal shape and color are generally planted by conventional methods, and abnormal vegetables may be treated with hormones. Such as leek, the leaves without hormones are narrow and have a strong fragrance. When its leaves are particularly thick and wide, which is 1 times wider than the common broad-leaved leek, it may be that hormones are used in the cultivation process. Some vegetables are not normal in color and should not be bought. If the vegetable leaves lose their usual green, they are dark green, the green of edamame is abnormal, and so on. , may be sprayed with pesticides or soaked in pesticides before harvesting.

Second, don't buy "moth-eaten vegetables". Among many kinds of vegetables, some vegetables are easily favored by pests and are called "multi-insect vegetables"; Some vegetables, which insects don't like to eat, are called "insect-less vegetables" and "insect-eaten vegetables". Because there are many pests, they have to be sprayed frequently, which is bound to form pesticide residues; The situation of "less insect vegetables" is the opposite. In order to avoid excessive intake of pesticides, we should try to choose "insect-free vegetables". This kind of vegetables mainly include lettuce, celery, chrysanthemum, carrot, onion, garlic, leek, green onion, coriander, amaranth and so on.

Third, don't buy vegetables with large fertilization. Excessive application of chemical fertilizers, especially nitrogen fertilizers (such as urea and ammonium sulfate). ), will cause serious nitric acid pollution of vegetables, not only bad taste, but also poor quality, harmful to health. After testing vegetables in the market, experts found that the nitrate content was mainly root vegetables and potato taro, and some of them were different by 10 times. The rule is that the pollution degree of roots, stems and leaves (i.e. vegetative bodies) of vegetables is much higher than that of flowers, fruits and seeds (i.e. reproductive bodies), which may be a common protective reaction in biology. Therefore, consumers should try to eat more fruits, beans and edible fungi, such as cucumber, tomato, edamame, Mi Dou, sweet corn and mushrooms.

How to buy rice

There are four points to pay attention to when buying rice: smell it, high-quality rice will have a unique fragrance, which people can tell by smell; Second, high-quality rice will not smell in the mouth when eaten raw, and it is easy to be crushed, and the tongue can taste starch; Three grasping, after high-quality rice is repeatedly grasped in the bag by hand, people can clearly see white material around the bag and on their hands, which is not available to the "plastic surgery" boss; Sichong, high-quality rice will not produce a lot of impurities after washing with warm water, while inferior rice and some "cosmetic" rice will precipitate a lot of impurities in water after brewing, and the added oil stains and wax stains will also be exposed after soaking.

Fresh meat: the fat is white, the muscles are shiny, the red is even, the appearance is slightly dry or slightly wet, and the depression pressed on the lean meat with your fingers can be recovered immediately, with good elasticity and the unique fragrance of fresh pork.

Stale meat: the fat is less shiny, the muscle color is slightly darker, the appearance is dry or sticky, the new section is wet, the depression can not be recovered immediately after finger pressing, the elasticity is poor, and it tastes slightly ammonia or sour.