Pre-test recipe: "If you spend too much on mental and physical strength, the vitamins and trace elements in the examinee's body will be consumed twice, and the digestive function will be reduced." Yesterday, Lu Li, director of the Nutrition Department of the Armed Police General Hospital, reminded parents to make preparations in five categories during the sprint stage of the college entrance examination. Lu Li believes that the focus of candidates' "refueling" before the exam lies in the diversification of food varieties. First of all, we must ensure the supply of carbohydrate-rich food, because it is the main source of blood sugar in the brain; Sedentary students are prone to constipation. Abdominal distension and loss of appetite caused by constipation will affect learning. Eat more coarse grains such as corn and sweet potatoes. At the same time, vegetables contain various vitamins, minerals and dietary fiber, which can improve students' learning efficiency; Meat, eggs, milk and beans can supplement high-quality protein, which can ensure that children have enough energy and endurance to cope with the huge consumption of physical and mental power. Lv Li said that during the preparation for the exam, attention should be paid to the following five types of food in the daily diet: the first category: 500 grams of steamed bread, noodles, corn and sweet potatoes, mainly providing carbohydrates, protein, B vitamins and dietary fiber; The second category: lean meat 100g, fish and shrimp 50g, eggs 50g and milk 250ml, mainly providing high-quality protein, fat, minerals, vitamins A and B; Category III: Soybean and its products 150g, mainly providing protein, fat, minerals, dietary fiber and B vitamins; The fourth category: 200 grams of fruits (more than two varieties) and 500 grams of vegetables (more than four varieties), mainly providing minerals, vitamin C, carotene and dietary fiber; Category V: edible oil 15g, sugar 10g, salt 6g.