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  3. Nobody likes stress. Not only can it cause sleepless nights and irritable days, we all suspect, at some level, that it can’t be

Nobody likes stress. Not only can it cause sleepless nights and irritable days, we all suspect, at some level, that it can’t be

admin2014-04-20  17
问题     Nobody likes stress. Not only can it cause sleepless nights and irritable days, we all suspect, at some level, that it can’t be good for our health. Now we can add another reason to reduce the stress in our lives; It may impair our thinking when we’re older, adding tarnish to the luster of our golden years.
    A recent study in the journal Neurology concludes that people who experience chronic psychological distress, such as anxiety or depression, are up to 40 percent more likely to develop mild cognitive impairment(MCI)than people not prone to distress. What is MCI? Well, it’s not dementia, but it does represent a measurable decline in thinking ability and may affect more than 30 percent of the older population. It was found that psychological distress did not appear to correlate with age, education, or gender. But people with higher distress scores tended to have more depressive symptoms. And those who are prone to chronic distress have been shown to be more likely to develop Alzheimer’s disease. They also are more likely to have their thinking decline at a faster rate.
    What this study doesn’t tell us is how chronic distress leads to the development of MCI. The authors of the study have some ideas: Perhaps being prone to chronic distress is one of the earliest signs of having MCI. I find this idea less than appealing, because it suggests that the horse is already out of the barn when it comes to chronic distress and the development of MCI. Fortunately, the authors believe there is a more likely explanation.
    Their leading theory is that stress has adverse effects on the parts of our brains that help us form and keep memories. They point out that there is evidence that stress has been shown to reduce our ability to form memories, and that severe stress—like post-traumatic stress disorder—may cause changes in the memory-forming parts of the brain. I find this a far more appealing theory, as it’s based on studies of how our brains work and gives us a chance to "turn things around" by dealing with chronic distress in a positive way.
    So for now, let’s focus on what we do know: that reducing the stress in our lives is good for lots of reasons. It’s good for our complexions, probably good for our hearts, and maybe even good for our brains.
In the first paragraph, the author introduces the topic by______.
选项 A、justifying an assumption
B、describing a scene
C、making a comparison
D、challenging a theory
答案A
解析 篇章题。作者在第一段中首先提出了大家默认的揣测：压力是对健康不利的，但是又似乎没有根据。接下来，作者提出已经有发现证明压力对思维能力不利，由此引出话题。可见，作者是通过证实某个假设来引出话题的。故[A]正确。[B]“描述一个情景”，只能概括第一句话，故该项属于以偏概全。[C]“进行比较”，原文没有比较的事物，排除。[D]“挑战一个理论”，原文并没有提及任何一条理论，更谈不上对它进行挑战了。
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