Ⅰ.阅读理解(共15小题；每小题2分；满分30分)
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Autumn blues? Let the sunshine in falling leaves, flowers，and cold winds. For many people late autumn can be a season of depression.
Those who suffer from “the autumn blue” are often extremely tired, 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 show that weather change is influential and strongly suggest that this condition is caused by changes in the availability (得到) of sunlight.”
