First of all, we should have regular physical examinations. You can't ignore the annual physical examination to help you find some hidden dangers of early diseases. Now physical examination is also more convenient, such as TTM physical examination, direct whole body scanning and screening for systemic diseases, which can find potential diseases in the body at an early stage and is safe and economical. Secondly, a scientific and reasonable diet. Don't be picky about food, partial eclipse, overeating or deliberately dieting in life, which will lead to malnutrition and reduce the body's resistance. Eat regularly and quantitatively, and don't eat casually, such as fried food, barbecue, pickles, canned food, fast food, frozen food, drinks, biscuits and other processed junk food. Third, keep exercising. Physical fitness is the capital of revolution, and taking part in physical exercise is the most direct and effective way to keep fit. For the elderly, there is a lot of extra time to exercise every day. In their spare time, they can go to the park to practice sword, play Tai Chi, run and dance.