The way to preserve one's health is a jingle: "If you are not sick, use tonics, and if you are cold, you will be seven points full;" Stick to women less, eat more meat and eggs, and run around. The so-called "three cold" refers to "spring cold", "May cold" and "autumn cold". Pay attention to increasing or decreasing clothes in the three cold seasons. From late March to early April, the average daily temperature for three or more consecutive days is lower than or equal to 65438 02℃, which is called "late spring cold". When the "cold spring" appears, it often causes the phenomenon of rotten seedlings and seeds. The weather in which the average daily temperature is lower than or equal to 20℃ for three or more consecutive days from late May to early June is called "May Cold". The "cold in May" weather mainly affects the booting stage and flowering stage of early rice, resulting in reduced production. Affected by cold air in autumn, the weather with the average daily temperature below 20℃ for three consecutive days or more for the first time is called "type 20 autumn chill"; The weather with daily average temperature lower than or equal to 23℃ is called "type 23 autumn cold". "Autumn cold" mainly affects the flowering and filling of late rice. The so-called "two falls" means sleeping well at noon and noon every day. Its main principle is "sleeping at noon and taking a nap at noon". The sleep theory in Huangdi Neijing is 1 1 in the evening and 1 in the morning, when yin flourishes and yang declines. Chinese medicine believes that "when the yang is exhausted, you will lie down." At this time, rest and sleep have the best effect and the highest quality of sleep, which can get twice the result with half the effort. Noon is 1 1 to afternoon 1. At this time, the yang is the most abundant and the yin is weak. "When the yin is exhausted, you will fall asleep", so you should sleep at noon. When the yang is strong, the work efficiency is usually the highest, so the lunch break is mainly a "nap", which only takes half an hour. Because the nap time is too long, it will disturb the human biological clock and affect sleep at night. Every meal is seven or eight full, healthy and long-lived. This is a conclusion. If rats eat for seven minutes at every meal, they will live longer. "Seven points full" means eating moderately and being full. The digestion, absorption and transportation of diet mainly depend on the spleen and stomach. Quantitative eating, hunger and satiety are moderate, just right, then the spleen and stomach can bear it. When the digestion and absorption function works normally, people can get nutrition supply in time to ensure various physiological functions. On the contrary, being too hungry or too full is not good for human health.