单选题
Many people believe they should drink eight glasses of water a day. That is
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they have been told all their life.
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a new report says people should drink as
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water as they feel like drinking. The report does not
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people how many glasses of water to drink. Instead,
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says women should get about 2.7 litres (升) of water a day,
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that men should get about 3.7 litres. In each
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, that is more than eight glasses.
As you might
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, the report says people need to drink more water
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they are doing physical (体力的) work. The same is true of those who live in hot weather. These people could need much more water
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others.