高考任务型阅读专项训练 (6) 含答案

2008-04-18 17:02:53   来源:转载   评论:0 点击:
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    Autumn blues? Let the sunshine in falling leaves, withering flowers, cold winds, faint sunshine. For many people late autumn can be a season of gloom and depression. Spirits can be low.
People who suffer from "the autumn blues" often are extremely exhausted, lack energy, need more sleep, feel increased appetite and gain weight.
    "The exact cause of this condition, often called seasonal depression or seasonal affective disorder (SAD), is not known yet," says Chen Jue, associate professor at Shanghai Mental Health Center. "But recent studies indicate that weather change is influential and strongly suggest that this condition is caused by changes in the availability of sunlight."
    One theory is that with decreased exposure to sunlight, the biological clock that regulates mood, sleep, and hormones is delayed, running more slowly in winter. Exposure to light may reset the biological clock.
    Another theory is that brain chemicals that transmit information between nerves may be altered in individuals with SAD. It is believed that exposure to light can correct these imbalances.
    "It is a sad season, but you can try to make it happy. Remember, spring always lives in your heart," Chen says.
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