If you drink a lot of tea and Coffee to keep you going then these have a diuretic effect so you should be drinking water to compensate.
通过喝大量茶和咖啡可以维持体力，同时它们有利尿作用，所以你也应该多喝点水来补偿。
Diuretic stuff: mannitol is a kind of mild laxative lapactic, which has a special curative effect to oliguria and the kidney function failure caused by dropsy, burnt and so on.
利尿剂，甘露醇是一种温和的轻泻剂，对水肿，烧伤等引起的少尿症及肾功能衰退有特殊疗效。
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