1, staple food and non-staple food Usually, staple food refers to rice, flour and miscellaneous grains. And non-staple food refers to meat, eggs, vegetables and other foods. Staple food and non-staple food are indispensable. Some people advocate eating more meat and less food, which is not in line with the way of health preservation. Some people want to lose weight and only eat staple food instead of non-staple food, but the result is just the opposite. Excess starch will be decomposed into glucose in the body and stored as fat. Some people think that the staple food is not nutritious, they don't eat dinner, their diet is impermanent, and snacks are constantly available. These do not meet the requirements of healthy diet. 2. Flour, rice and coarse grains Eating coarse grains has become a new fashion in recent years. Many people like to eat coarse grains, thinking that it has high nutritional value and good taste, which is good for teeth and facial muscles. However, although coarse grains are good, it is not advisable to eat more. Because it contains too much dietary fiber, it will affect the human body's absorption of protein, inorganic salts and some trace elements, and even damage the human reproductive capacity. In the daily diet, it is healthiest to control the ratio of flour and rice to coarse grains at 4: 6. 3. Acidity and alkalinity In fact, the acidity and alkalinity of food is not determined by our taste, but related to its mineral content. So fruits usually taste sour, such as lemon and carambola, but they are all alkaline foods. Another example is rice, which has no obvious taste response and is acidic food. According to the classification of daily food, most animal foods are acidic foods, such as fish, meat and shellfish. In addition, most cereals and some nuts are also acidic foods. 4. A reasonable combination of vegetarian food and vegetarian food can make people feel satisfied and will not increase the burden on blood and heart because of eating too much animal food. Our China people's eating habits are mainly based on plant food, supplemented by animal food. This diet is more conducive to longevity. 5, thin and thin, every meal should be thin. Some people only eat dry food in order to save trouble, which not only affects the gastrointestinal absorption effect, but also easily causes imbalance in the proportion of nutrients. Of course, eating thin rice is not a good habit. Nutrition experts suggest that fat people should be diluted first and then dried, while thin people should be dried first and then diluted. 6. Variety and quantity The more varieties of food you eat every day, the better, but the quantity should be properly controlled. 7, sweet and sour, eat more bitter and spicy food, eat less sweet and sour food. 8. Eat more food cooked by small fire (stew, stew, simmer, simmer) and eat less food cooked by big fire (fry, explode, burn). 9. Hot and cold foods are cold, hot, warm and cold. Nutrition experts suggest a balanced diet, supplemented by heat for those who are cold and cold for those who are hot. If this balance is destroyed, it will definitely hurt the body, and maintaining this balance can prolong life. For example: drink a bowl of cool mung bean soup in hot summer; When it is cold in winter, drink red bean soup; To eat cold crabs, you must eat some Jiang Mo and drink a cup of brown sugar ginger soup after eating; To eat instant-boiled mutton in winter, you must match some cold cabbage, tofu, vermicelli and so on. 10, if you are hungry, you should not be too hungry and too full. If you are too hungry, you will hurt your intestines and your stomach. Scientific diet is very important to protect organ health. If the long-term hunger and satiety are not balanced, it will not only affect the gastrointestinal function, but also get chronic digestive tract diseases in the long run. Therefore, if you want to be healthy, you can divide it into two types: hunger and cold. Spring: According to Chinese medicine, the day before long summer in beginning of spring is March, and the third month of spring is the season of hair growth. The weather turns from cold to warm, the east wind relieves the chill, spring rises, and all kinds of creatures in nature germinate and develop, abandoning the old and welcoming the new. People should go to bed early and get up early, take a walk in the yard, exercise properly, and pay attention to warm exercise to adapt to the spring air. And let the body and mind feel comfortable and lively, and let the body adapt to the spring air. In life, we should pay attention to being happy, avoid being angry, and have the idea of not killing or taking away, rewarding without punishment, so as to maintain the normal growth and regulation of liver qi. If this natural law is violated, liver qi will be damaged, and cold diseases will easily occur in summer, making it difficult for the human body to adapt to the "long" qi in summer. Traditional Chinese medicine believes that the effect of health preservation is not limited to the current season, but also should lay a good foundation for the next season. In other words, if you can't keep in good health in this season, it will cause unhealthy state in the next season, and many diseases will easily occur. If we can pay attention to the "qi of hair growth" in spring, we won't get sick or less this season, and we won't get a cold in summer. If you don't pay attention to the "qi of hair growth", you will not only be near at that time, but also be left behind. Neijing pointed out: "If you go against the spring qi, you will have less yang qi and liver qi will not be born." The liver belongs to the main wind of wood, which belongs to the east of nature and is prosperous in spring. Therefore, if you don't keep in good health in spring and don't pay attention to nursed back to health, it's easy to hurt your liver, but you can't be angry with your liver injury. There is not enough fire in summer, and cold water will insult you, so you are prone to catch a cold. Spring returns to the earth, everything recovers, and the climate gets warmer in March, which is the main symbol of spring. However, spring is also a season of changeable climate, especially in early spring, when the climate changes even more, cold currents often attack and the temperature drops suddenly. In daily life, people often say that "spring covers and autumn freezes". The so-called "spring cover" means that you should not take off your cotton-padded clothes too early in spring, but take them off later and reduce them one by one. This is scientific from the weather and climate characteristics in spring and the adaptability of human body to the external environment. Due to the frequent climate changes in spring, hot and cold, windy and dusty, less spring rain, anger and other emotions are easy to stimulate and hurt the liver, and some patients with coronary heart disease are easy to deteriorate. In addition, due to the changes from winter to spring, people's ability to resist diseases and adapt to the climate is weak, and there are more epidemic diseases. If they are not careful, they will get sick. Especially the elderly, the infirm and children, we should pay attention to catching a cold in spring. If they are not properly treated and protected, they often lead to hepatitis. In addition, infectious diseases such as measles, scarlet fever, mumps and epidemic cerebrospinal meningitis are extremely contagious. Motherland medicine also believes that in spring, people with strong liver qi and weak temper should eat less sour food and more sweet food. Because sour taste belongs to the liver and sweet taste belongs to the spleen, we should pay attention to aftercare. In spring, besides paying attention to the above aspects of conditioning, we should also strengthen physical exercise, pay attention to moderate work and rest, improve nutrition according to the characteristics of spring, and enhance physical disease resistance. Summer: Chinese medicine believes that summer is the season when people's hearts are strong and their lungs are weak, so they should go to bed late and get up early. Bitter taste belongs to the heart and spicy taste belongs to the lungs, so you should eat some spicy food in summer. Although the weather is hot, don't be greedy for cold. When sleeping, cover your abdomen with a quilt to avoid catching cold and diarrhea. Avoid the invasion of moisture in rainy season and change clothes in time. Always massage Yongquan point on the soles of your feet, and don't go barefoot to avoid moisture invading from the soles of your feet. Autumn: Traditional Chinese medicine believes that it is March from beginning of autumn to beginning of winter, when the yang is weak, the yin is cold and the scenery is depressed, so health preservation should follow. You should go to bed early and get up early in autumn, which is very beneficial to your health. Eat less spicy food and more sour food. When the temperature drops, you should add clothes in time to avoid catching cold. Chinese medicine believes that when the yang is restrained and the yin is abundant in autumn, people should make peace with the autumn and keep the yin essence in the body to prevent the will from exceeding and prevent the house from hurting the kidney. Everything withers in autumn, and the elderly worry too much, resulting in a feeling of lethargy, which is manifested as emotional instability, irritability, difficulty sleeping and other symptoms. Li Dongyuan, a medical scientist in the Jin Dynasty, said, "All anger, sadness and fear will damage your vitality." The Medical Series says, "If you are busy and don't concentrate, you will get old easily." Therefore, we should maintain emotional stability, such as the autumn moon, worry less, think less, and make our mind peaceful. Modern medical research shows that when the mental system is stimulated, it will lead to the disorder of the normal balance of the body and prone to diseases. A cheerful mood keeps the spirit in a state of constant happiness, which can contribute to health. Winter: Go to bed early and get up later in winter. Winter is the season when kidney-qi is strong and heart-qi is weak. Salty taste belongs to the kidney, so eat less. Try to avoid eating greasy and indigestible food baked by moxibustion. Keep your abdomen and feet warm. The indoor temperature should not be too high, otherwise it is easy to catch cold when going out.

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