Healthy diet: maintain a balanced diet and moderate exercise, control the balance of energy intake and consumption, reduce the intake of foods high in fat, sugar, salt and cholesterol, and eat more vegetables, fruits, whole grains, low-fat dairy products, lean meat, fish and other foods. Mental health: keep positive emotions and mentality, avoid excessive emotional fluctuations, learn to manage your emotions, such as stress management and emotional adjustment, and seek the help of professional psychologists in time when encountering psychological problems. Exercise: Keep moderate exercise, such as walking, jogging, swimming, yoga, etc. , at least 150 minutes a week, which is helpful to strengthen heart and lung function, strengthen bones, improve immunity and promote metabolism. Prevention of infectious diseases: maintain good personal hygiene habits, such as washing hands frequently, not spitting, not littering, etc. Avoid contact with people or articles suffering from infectious diseases, and vaccinate in time, such as influenza vaccine, hepatitis B vaccine, varicella vaccine, etc. Prevention of chronic diseases: avoid excessive smoking and drinking, and prevent chronic diseases, such as hypertension, diabetes, cardiovascular and cerebrovascular diseases, obesity, etc. Prevention and control can be carried out by controlling diet, strengthening exercise, regular physical examination and timely treatment.