The finding comes from a study of 231 women of all ages who were quizzed about their living habits, including whether they were sun-worshippers. It didn’t take into account the sleep pattern. Then researchers from Massachusetts General Hospital guessed how old the women were. Those who took care in the sun tended to have aged more slowly. A lucky four had so few wrinkles and age spots that they appeared to be two decades younger than they really were.

　　Alexa Kimball, a professor of dermatology (皮肤学), says the popular idea that we drink lots of water to stay healthy is a myth and the body is good at judging how much we need. Previous research by the British Nutrition Foundation(BNF)reached a similar conclusion. Just drinking water for the sake of drinking water really has no effect on improving the skin.

　　A second study suggested that low-level day to day exposure to the sun is more ageing than occasional stay in the hot sun. Finally, DNA examination of tiny samples of the women’s skin gave some insight into the damage done by the sun.

　　Health experts claim that when women become old, the cells of the skin can be tired out. So they urge women should care about their face year round and not just when on a beach holiday. Besides, wearing the sunscreen every day can make a difference.

　　33. What do we know about the study?

　　A. It mainly focused on sleeping

　　B. The women were of the same age.

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