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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

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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.
By "the horse is already out of the barn"(Line 3,Paragraph 3)the author means______.
选项 A、it is too late to do anything
B、we are at a total loss
C、the result is unpredictable
D、people’s lives may be threatened
答案A
解析 语义题。本题所考查的是一句俗语，要求考生理解它的喻义，其解答需联系第三段和第四段的相关内容。作者对这两段所介绍的推想表达了不同的态度。本句是在解释他不喜欢第一个假想的原因。我们可以先解读他喜欢第二个推想的原因：如果第二个假想成立，则只要方法正确，我们还有机会在人们出现心理烦恼的时候加以干预，扭转局面，防止更严重的思维障碍。由此可以推断，第一个假想的成立则意味着一旦出现慢性心理烦恼，就“做什么都没有用了”。因此，[A]为答案。四个选项中可首先可排除[D]，本文讨论的是心理和认知方面的疾病，全篇没有暗示其与生命安全有关，故排除[D]。而[B]“我们完全感到迷惑”，这显然也不合原文，因为新的研究至少已经让我们对轻度认知障碍等疾患有了一些了解。[C]“结果不可预料”，根据上述的分析，此项也不能解释作者不喜欢本段假说的原因，也应排除。
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