四、阅读理解

Animals react to the changing seasons with changes in mood and behavior and human beings are no exception. Most people find they eat and sleep slightly more in winter and dislike the dark mornings and short days. For some, however, symptoms (症状) are severe enough to damage their lives and to cause considerable stress. These people are suffering from SAD. The symptoms tend to start from around September each year lasting until April, but are at their worst in the darkest months. kaixin100.cn

The standard figure says that around 2% of people in Northern Europe suffer badly, with many more (10%) putting up with milder symptoms. Across the world the incidence (发生率) increases with distance from the equator (赤道), except where there is snow on the ground, when it becomes less common. More women than men are found having SAD. Children and young people can also suffer from it.

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The problem stems from the lack of bright light in winter. Researchers have proved that bright light makes a difference to the brain chemistry, although the exact means by which sufferers are affected is not yet known. Kaixin100网络，Kaixin100

As the cause is lack of bright light, the treatment is to be in bright light every day by using a lightbox or a similar bright treatment. (Going to a brightly-lit climate, whether skiing or somewhere hot, is indeed a cure). The preferred level of light is about as bright as a spring morning on a clear day and for most people sitting in front of a lightbox, allowing the light to reach the eyes, for between 15 and 45 minutes daily will be sufficient to alleviate the symptoms. The user does not have to stare at the light, but can watch TV or read a book, just allowing the light to reach the eyes. OUTSIDE IN have a complete range of suitable lights, all in line with the research findings from medical and academic facilities. They are all available on our pioneering HOME TRIAL SYSTEM. copyright kaixin100

46. Which of the following statements is false according to the passage? Kaixin100内容管理系统

A.Going skiing is one of the good cures for SAD.

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B.The percentage of SAD sufferers is high in North Europe.

C.Doctors now know how lack of bright light causes SAD. copyright kaixin100

D.People of all ages and both sexes may suffer from SAD. Kaixin100内容管理系统

47. What does the word “alleviate” (Paragraph 4) most probably mean? kaixin100.cn

A.“cause” Kaixin100网络，Kaixin100

B.“produce”

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C.“show”

D.“reduce” kaixin100.cn

48. What does the last paragraph mainly talk about? 内容来自kaixin100

A.Why people suffer from SAD.

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B.How SAD patients can be treated.

C.How long an SAD treatment lasts.

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D.Where people can go for SAD treatment. copyright kaixin100

49. What happens to SAD patients, according to the passage? 本文来自Kaixin100

A.They eat more and sleep less. copyright kaixin100

B.They are cheerless and worried. 本文来自Kaixin100

C.They react to the changing seasons. 本文来自Kaixin100

D.They dislike long days with dark mornings. 本文来自Kaixin100

50. In which month do SAD symptoms become worst?

A.December. kaixin100.cn

B.September. copyright kaixin100

C.April.

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D.February.

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参考答案： kaixin100.cn

46. C 47. D 48. B 49. C 50. A 内容来自kaixin100