Level 1: Dietary Nutrition 1. Reasonable Dietary Combination Children\’s diet should follow the principle of \”grains as the basis, vegetables and fruits as the mainstay\”, and they should consume enough carbohydrates, proteins, fats, vitamins and minerals every day. Parents can make reasonable meal plans based on their children\’s age and physical condition to ensure that their children eat healthily. 2. Eat more foods rich in vitamin C. Vitamin C is one of the important nutrients that enhances immunity. It can promote the body’s response to bacteria.