"Health means a person's physical, mental and social condition is good. Health includes two aspects: first, the main organs are disease-free, the body shape develops well and evenly, the physiological functions of various human systems are good, and there is strong physical activity and labor ability, which is the most basic requirement of health; Second, it has strong disease resistance and can adapt to the effects of environmental changes, various physiological stimuli and pathogenic factors on the body.