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  3. The cold is bad enough, but winters shorter days make the season a downer, t

The cold is bad enough, but winters shorter days make the season a downer, t

游客2024-09-22  7
问题     The cold is bad enough, but winters shorter days make the season a downer, to say the least. But how real is seasonal affective disorcer(known as SAD)?
    SAD is often a catch-all term to describe the winter dumps, but experts say it’s often misused and the condition is actually less common than people think. "There are a lot of myths. SAD is not a myth. It is a mental disorder that is incompletely understood and also something that is complicated by questions about the role of evolutionary biology," says Dr. Jeffrey Lieberman, the president of the American Psychiatric Association.
    That diagnosis is different from the lows that many feel during the winter months. In fact, research shows many people overestimate the impact of seasons on their moods in general.
    Where is the line between SAD and the simple doldrums? How much winter sadness is the product of a mood-based disorder, and how much is a natural outcome of being cooped up indoors? SAD is considered a subtype of a mood disorder like depression or bipolar disorder(躁郁症), so a very small percentage are actually diagnosed with it. In order to meet the qualifications for a SAD diagnosis, according to the Mayo Clinic, an individual must be show the following: depression and other symptoms for a minimum of two consecutive years during the same season; depression-free periods following episodes of depression; unexplained behavior and mood changes.
    For most other cases of seasonal mood changes, Lieberman says making some lifestyle changes such as exercising or keeping good sleeping habits can help. "It’s important to realize that just like people on Mondays have physical and emotional symptoms, you deal with it. You don’t take a treatment for Mondays. " It only warrants treatment when it starts to interfere with daily life, he says.
    What about the bright light lamps that claim to relieve depression during the darker months? They’re based on the idea that light therapy can boost melatonin(褪黑激素)levels, and also serotonin(血清素)in the brain—higher levels of serotonin between nerve connections can have anti-depressive effects. But as appealing as that sounds, Lieberman says there isn’t solid evidence behind it. "Light therapy is not a fake, but the evidence is not that strong," he says. "But since it’s not invasive, it also isn’t harmful—except perhaps to your budget. "
    So if you’re not feeling your usual cheerful self this winter, see your doctor. If he doesn’t diagnose you with SAD, try adding some physical activity to your day and getting regular sleep. And remember that spring is just a few months away. [br] We can learn from the passage that SAD is______.
选项 A、a common condition among people
B、a term referring to the winter dumps
C、a term not being totally understood
D、a term of evolutionary biology
答案 C
解析 细节题。第二段提到，SAD是一种没有被完全理解的精神障碍，也是被进化生物学的作用复杂化了的问题，故选[C]，同时排除[D]。根据第二段第一句可知，SAD经常泛指冬季低谷期，但是，专家称这个概念常被错误地使用，这种情况实际上并没有人们想象的那么普遍，故排除[A]和[B]。
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