1. According to the standard of "Reference Intake of Dietary Nutrients for Residents in China", the average daily requirement of various nutrients per person was designed for catering. The supply of heat energy and various nutrients for breakfast accounts for about 30% of the total daily demand, while lunch accounts for 40% and dinner accounts for 30%. Each person needs about 2000-2400 kilocalories per day, of which 12- 15% comes from protein, 25-30% comes from fat and 60-65% comes from carbohydrates.

2. Preparation principle:

1) The food is diverse, mainly cereals, ensuring milk and eggs and increasing vegetables and fruits.

2) Ensure that breakfast is good, lunch is full and dinner is few, and the ratio of three meals is 3:4:3.

3) Eat less snacks, drink less sugary and carbonated drinks, and control sugar intake.

4) Drink milk and 6-8 glasses of water every day.

3. It is recommended to use 25 grams of salad oil all day.