There's two important factors to keep health. The first one, eat on a balanced diet.Avoid eating high-fat and high cholesterol food such as mooncakes and animal livers.Instead eat more fruits and vegetables because they contain high nutritional values. Exercise can help us protect and improve our health by strengthen our muscles and maintain body weight. It also improves mental health. Exercise regularly is really necessary.Everybody should exercise for at least 3 days per week.To sum up, a balanced diet and regular exercise can help us to keep health.