When people first arrive at the plateau, digestive function will be affected, stomach tension will decrease, peristalsis will slow down and emptying time will be prolonged. At the same time, hypoxia also reduces the secretion of digestive juice and increases vitamin consumption. Try to choose some foods that are easy to digest and absorb as the staple food, soft and liquid foods are better, such as noodles and porridge, and non-staple foods are mainly light vegetables and fruits rich in vitamins. In addition, you can't eat too much every meal, and you can eat 70% full, especially at dinner, so as not to increase the burden on the gastrointestinal tract, oppress the heart and lungs, and cause chest tightness and palpitation. Because the plateau climate is dry and the water loss is fast, many tourists are eager to replenish water. In fact, drinking too much water is not good for people who have not adapted to the plateau environment, and may cause pulmonary edema. Reducing salt intake and banning smoking and alcohol can alleviate altitude sickness. Tomatoes and bean products can prevent altitude sickness. Eat more antioxidant foods to prevent altitude sickness. Tomatoes, oranges, bean products, tea and other foods are rich in nutrients such as vitamin E, vitamin C and soybean isoflavones, which have a strong antioxidant effect. Rhodiola can be taken about 0/0 days before traveling, which has certain effects on anti-hypoxia, anti-fatigue and anti-cold. When traveling, once altitude sickness occurs, taking glucose solution and taking American ginseng buccal tablets orally can also relieve fatigue. Eat some sugar packets and sweet potatoes to prevent physical decline. Tibet and other plateau areas have high altitude, low oxygen content and dry climate. The human body consumes 3%~5% more energy in five days here than in plain areas, and consumes 2 ~ 5 times as much vitamins under anoxic conditions as usual. After gradually adapting to the plateau environment for 2 ~ 3 days, you must adjust your diet again. Moderately increase the intake of carbohydrates. Human energy mainly comes from protein, fat and carbohydrates. When the same energy is generated, only carbohydrates consume the least oxygen. Therefore, increasing high carbohydrate diet, such as sugar packets and sweet potatoes, can prevent physical decline and improve aerobic exercise ability. With the increase of protein intake in plateau area, the protein metabolism of the body will be strengthened, so it is necessary to consume enough high-quality protein, such as lean meat, eggs, fish, milk and shrimp. Protein proportion accounts for 15% of the total energy. Increasing the intake of vitamins, eating more fresh fruits and vegetables, eating some liver properly and supplementing vitamins can promote aerobic metabolism and improve the body's hypoxia tolerance. Water is also indispensable. Drink 3~4 liters of water every day.