② Non-staple food: choose soybeans and bean products, eggs, fish and meat; Eat more vegetables, you should eat about 500 grams a day; Eat more peanuts, walnuts, sunflower seeds, pine nuts and sesame seeds, because these foods are rich in protein, unsaturated fatty acids, lecithin, vitamins and inorganic salts.

③ The efficiency of mental work is closely related to nutrients such as sugar, protein, lipids, vitamins, etc., and the requirements for diet quality are relatively higher.

In addition, my suggestion is to pay attention to the combination of work and rest. Now, every minute should be precious to you, but adequate sleep is the prerequisite to ensure that you have enough energy. In this way, the reading efficiency is much higher, and we must avoid staying up late to study and ensure eight hours of sleep every day. Don't worry, these eight hours are definitely not wasted. Pay attention to a reasonable diet in nutrition.