As the saying goes, if you want to keep safe, you must be hungry and cold. Adequate food and clothing is the source of all diseases today! In diet, three meals a day should be ordered on time, and the thickness should be matched with meat and vegetables. Don't overeat every meal, and avoid overeating. Wear increases or decreases with the seasonal temperature. Houses should be cleaned and ventilated frequently. The most important thing is to exercise regularly and keep a good attitude! People who are open-minded and contented are happy all their lives, which money can't buy.