You can't go on a diet and have no time to exercise at this time. Eat reasonably, but don't ask so fast. Reduce carbohydrates (staple food) appropriately. Let mother cook rice into a mixture of brown rice and japonica rice. Eat as much brown rice as possible in proportion, and the absorption rate of coarse grains will be much lower. Choosing stew will reduce the synergistic absorption of fat and protein. Eating steamed fish can also improve memory. Eat two bananas every day. Try to eat the last meal before studying at night, and don't eat it when you get home. If you are really hungry, drink a cup of soybean milk with honey. There are also dishes that are mainly staple foods, so that family members can reduce the consumption of cooking oil and salt when cooking, which are not conducive to losing weight rather than increasing nutrition. If you want to go home for self-study in the evening, you should get off at one stop in advance and walk. At the same time, you can recall the key points of your study this day, secretly remember, and make up the time for walking. If you live on campus, you can take a walk on the playground.