A balanced diet is the cornerstone of good health, and an unreasonable diet is one of the main causes of chronic diseases. Unreasonable diet is manifested in unreasonable diet structure, improper cooking methods and bad eating habits. Unreasonable dietary structure includes high salt, high cholesterol, high calorie diet and low cellulose diet; Improper cooking methods such as pickling and smoking; Bad eating habits can be reflected in irregular eating time, overeating and so on. So, the question should be e.