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Many of us depend on a mug of freshly brewed coffee to perk us up in the mornings. 我们中间的很多人早上都要靠一杯新鲜的现煮咖啡提神。 But its mood-boosting effect could well be lasting far longer than we realise, claim scientists. 但是据科学家称，提神的效果将会比我们想象的还要长。 They have discovered that women who drink four or more cups a day are a fifth less likely to become depressed. 他们研究发现每天喝四杯咖啡的女士的抑郁症的几率将会大大降低。 And those who drink between two or three reduce their risk by 15 per cent. 而那些喝两到三杯的，得抑郁症的概率则会降低15%。 Researchers at Harvard University compared the coffee intake and risk of depression amongst nearly 51,000 women over ten years. 在哈佛大学的研究者对比了在10年间大约5万一千名女士们喝咖啡的量和患抑郁症的概率。 They did not look at men – but other studies have found it has a similar effect. 他们并没有做关于男士的研究，但是其他的一些研究发现结果是相似的。 The scientists, whose findings are published in the Journal of American Medicine Association, think that caffeine works like antidepressant pills by stopping the production of certain hormones such as serotonin. 那些将研究结果发表在美国医学协会杂志上的科学家认为在停止分泌雌激素上面，咖啡因和某些抗抑郁的药物例如血清素的功能是一样的。 | 
