Hainan Airlines, Shenzhen is a beautiful coastal city with spring all year round.

analysis: Xiamen is a beautiful coastal city, surrounded by the sea, with plenty of water, because the specific heat capacity of water is large. Compared with mud and sand, water with the same quality absorbs or releases the same heat, and the temperature of water rises or falls less. According to this analysis, Xiamen is a beautiful coastal city, surrounded by the sea, with plenty of water. Because the specific heat capacity of water is large, during the day, water with the same quality is compared with sand. At night, the same heat is released, and the temperature of water decreases less, which makes the temperature difference between day and night in this area small. Therefore, B. Comments: About the application of water with large specific heat capacity: water can be used as a radiator and coolant to explain the climate difference between coastal areas and inland areas, the reason of urban heat island effect and so on.