早上起床喝一大杯水有必要吗？
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想得到怎样的帮助：早上起床喝一大杯水，是必要的么？
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早上起床喝一大杯水是有必要的。经过一夜的睡眠，人体会通过呼吸、出汗等方式丢失不少水分，血液也会变得相对黏稠。此时喝一大杯水，可以补充身体所需的水分，稀释血液，促进血液循环，有助于降低血液黏稠度，预防心血管疾病的发生。还能刺激肠胃蠕动，促进排便，预防便秘。建议喝温水，水温以 30℃ - 40℃为宜，避免喝凉水或过热的水，以免对肠胃造成刺激。一般来说，200 毫升左右的水较为合适。
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