1. Increase the intake of protein: protein is the basic component of body cells and tissues, and it is also necessary for muscle growth. Children can eat more protein-rich foods such as meat, fish, beans and nuts.
2. Increase the intake of carbohydrates: carbohydrates are the main source of body energy and can help children gain weight. Children can eat more foods rich in carbohydrates, such as rice, bread, noodles and potatoes.
3. Increase fat intake: Fat is an important form of energy storage in the body, which can help children gain weight. Children can eat more healthy and fat-rich foods such as nuts, fish oil and olive oil.
4. Give children more fruits and vegetables: Fruits and vegetables are rich in vitamins and minerals, which can help children stay healthy. Children can eat more colorful fruits and vegetables, such as carrots, broccoli and spinach.
5. Give children plenty of water: Water is an important part of the body, which can help children digest food and absorb nutrients. It can make children drink enough water every day to keep their body water balance.
6. Avoid giving children too much sugar and junk food: too much sugar and junk food can lead to obesity and other health problems and should be avoided as much as possible.