适时地休息。 吃点零食喝点水。 完成作业后用有趣的活动犒劳自己。

I'm interested in that, but I only have a few mins. Can you give me at most the first 500 characters of a detailed explanation in English about that?
Focusing for hours and hours without stopping will most likely just slow you down. Every 25 minutes or so, take about 5 minutes to stretch and walk around to give your brain and body a quick rest. Drink plenty of water and eat light, healthy, tasty snacks while you work to enjoy foods that you like, enhance your memory, and revitalize your brain and body. Stay away from soda, sugary junk food and energy drinks while you work to make sure that you won’t crash halfway through completing your homew