1, a reasonable baby meal means that the food is rich in nutrition, without too much energy, trans fatty acids and added sugar or salt. The focus is on the food diversity of complementary food for infants. The more diversified the food in the baby's complementary food, the better the baby's overall intake of nutrients, especially the intake of micronutrients, such as vitamin A, vitamin B, iron, calcium, folic acid and zinc. This plays an important role in the growth and development of babies.

2. The significance of complementary food addition is to help the baby gradually transition to family food from 6 months to 2 years old. Adults eat many kinds of food every day. In addition to meeting the needs of survival, we also need to enjoy the rich taste of food. Similarly, the food for infants and young children should not only consider comprehensive nutrition, but also help the baby to try the texture and taste of various foods, gradually accept and love various foods, and avoid partial eclipse and picky eaters. Try to breastfeed exclusively within 6 months. If breast milk is insufficient, formula milk can be added.

3. Generally, the daily milk quantity is 600-800ml within one year old and 400-600ml between one year old and two years old. Later, with the increase of age, the amount of milk can be reduced appropriately. A small amount of complementary food (fortified iron rice flour, vegetable paste, fruit paste and egg yolk) can be added from 6 months, and animal proteins such as meat paste and fish paste can be added from thin to thick, from small to large, and from fine to coarse. 1 year-old can have two meals a day, and 1 year-old can have three meals a day. There are many kinds of meat and vegetables mixed together. /kloc-don't eat salt within 0/year.

4. Breastfeeding, lactose and oligosaccharides in breast milk can promote the colonization and growth of intestinal probiotics in the intestine, which is conducive to the early establishment of a healthy intestinal microecological environment and the development of immune system. Immunoactive substances contained in breast milk help to resist the infection of various pathogenic microorganisms. Lysozyme, complement, cytokines and even white blood cells contained in breast milk can promote the maturity of infant immune system. Scientific nutritious diet can effectively improve the nutritional status, enhance the resistance, and contribute to the prevention and treatment of novel coronavirus.