Many people believe they should drink eight glasses of water a day. That is 1 they have been told all their life. 2 a new report says people should drink as 3 water as they feel like drinking. The report does not 4 people how many glasses of water to drink. Instead, 5 says women should get about 2.7 litres(升) of water a day, 6 that men should get about 3.7 litres. In each 7 , that is more than eight glasses. As you might 8 , the report says people need to drink more water 9 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 10 others.