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  3. Losing your ability to think and remember is pretty scary. We know the risk of dementia (痴呆症) increases with age. But if you hav

Losing your ability to think and remember is pretty scary. We know the risk of dementia (痴呆症) increases with age. But if you hav

admin2021-01-06  18
问题    Losing your ability to think and remember is pretty scary. We know the risk of dementia (痴呆症) increases with age. But if you have memory slips, you probably needn’ t worry. There are pretty clear differences between signs of dementia and age-related memory loss.
   After age 50, it’ s quite common to have trouble remembering the names of people, places and things quickly, says Dr. Kirk Daffher of Brigham and Women’ s Hospital in Boston.
   The brain ages just like the rest of the body. Certain parts shrink, especially areas in the brain that are important to learning, memory and planning. Changes in brain cells can affect communication between different regions of the brain. And blood flow can be reduced as blood vessels narrow.
   Forgetting the name of an actor in a favorite movie, for example, is nothing to worry about. But if you forget the plot of the movie or don’ t remember even seeing it, that’ s far more concerning, Daffner says.
   When you forget entire experiences, he says, that’ s " a red flag that something more serious may be involved ". Forgetting how to operate a familiar object like a microwave oven, or forgetting how to drive to the house of a friend you’ ve visited many times before can also be signs of something going wrong.
   But even then, Daffner says, people shouldn ’ t panic. There are many things that can cause confusion and memory loss, including health problems like temporary stoppage of breathing during sleep, high blood pressure, or depression, as well as medications (药物) like antidepressants.
   You don’ t have to figure this out on your own. Daffner suggests going to your doctor to check on medications, health problems and other issues that could be affecting memory. And the best defense against memory loss is to try to prevent it by building up your brain’ s cognitive (认知的) reserve, Daffner says.
   "Read books, go to movies, take on new hobbies or activities that force one to think in novel ways," he says. In other words, keep your brain busy and working. And also get physically active, because exercise is a known brain booster.
Why does the author say that one needn’t be concerned about memory slips?
选项 A、Not all of them are symptoms of dementia.
B、They occur only among certain groups of people.
C、Not all of them are related to one’ s age.
D、They are quite common among fifty-year-olds.
答案A
解析 细节题。原文第一段最后一句话指出，但如果你有记忆溜走了，你可能并不用担心。痴呆症的症状和与年龄相关的健忘有明显的区别。由此可知，并不是所有的记忆丢失状况都需要去担忧，因为并不是所有的健忘都和痴呆症有关，故答案为A。B、C两项原文均未提及，故排除。D项与原文不符，原文第二段达佛纳博士表明，五十岁以后，很难快速地记住人名、地名和事物名称的现象是很常见的，但并没有表示记忆缺失在五十岁的人中很常见，故排除。
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