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人为什么会需要水呢？

水是人体的基本生理需要之一，身体的各项功能都需要水的支持。水有助于维持体温，调节血液循环，帮助消化和吸收营养物质，排出废物，润滑关节，维持皮肤健康等。人体约60%是由水构成的，所以保持水平衡对健康至关重要。当体内水分不足时，会出现口渴、皮肤干燥、尿量减少等症状，如果长期缺水，可能导致脱水甚至危及生命。

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