Tomatoes, watermelons, bayberries, melons, peaches, plums and other vegetables. Especially rich in vitamin C, vitamin B is higher in cereals, beans, animal livers, lean meat and eggs. To supplement water and inorganic salts: you can eat foods with high potassium content, such as fruits, vegetables, beans or bean products, kelp, eggs and so on. Eat more foods that clear away heat and promote diuresis: watermelon, bitter gourd, peach, dark plum, strawberry, tomato, cucumber, mung bean and so on.

■ There is a limit to drinking cold drinks. In summer, the body's yang is outside and yin is inside, so the secretion of gastric juice is relatively reduced and the digestive function is low. Therefore, excessive consumption of cold drinks is strictly prohibited. In addition, don't eat too much cold drinks after sweating, especially some patients with chronic diseases, and have a choice when eating cold drinks. Such as coronary heart disease, asthma, chronic bronchitis, should not eat frozen food; Those with gastric ulcer and hyperacidity should not use sour cold drinks; Diabetic patients should not use sugary drinks. It should also be noted that drinking drinks can not replace drinking water, and it is better to drink tea to relieve summer heat. Hot tea is an ideal drink in summer.

■ Don't wait for thirst to drink water. People in summer are particularly thirsty and need to drink water at any time. How to drink water is scientific? First, don't wait for thirst before drinking water. When thirsty, it means that the water in the human body is out of balance and the cells begin to dehydrate. At this time, it is too late to drink water. Second, don't drink too much when you are thirsty, so drinking water will make your stomach difficult to adapt and cause adverse consequences. The predecessors advocated: "Don't drink too much if you don't want to be extremely thirsty", which is a scientific method to prevent thirst and choose to drink water. Third, it is not advisable to drink water before or during meals, because drinking water before or during meals will dilute the digestive juice, which is not conducive to the digestion and absorption of food and is not good for the health for a long time. Fourth, drink some water before getting up in the morning, which can replenish the water consumed overnight, reduce blood concentration, promote blood circulation and maintain the normal level of body fluids.