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  3. Researchers have established that when people are mentally engaged, biochemi

Researchers have established that when people are mentally engaged, biochemi

游客2023-07-16  53
问题     Researchers have established that when people are mentally engaged, biochemical changes occur in the brain that allow it to act more effectively in cognitive areas such as attention and memory. This is true regardless of age.
    People will be alert and receptive if they are faced with information that gets them to think about things they are interested in. And someone with a history of doing more rather than less will go into old age more cognitively sound than someone who has not had an active mind.
    Many experts are so convinced of the benefits of challenging the brain that they are putting the theory to work in their own lives. "The idea is not necessarily to learn to memorize enormous amounts of information", says James Foard, associate director of National Institute on Aging. "Most of us don’t need that kind of skills. Such specific training is of less interest than being able to maintain mental alertness." Foard and others say they challenge their brains with different mental skills, both because they enjoy them and because they are sure that their range of activities will help the way their brains work.
    Gene Cohen, acting director of the same institute, suggests that people in their old age should engage in mental and physical activities individually as well as in groups. Cohen says that we are frequently advised to keep physically active as we age, but older people need to keep mentally active as well. Those who do are more likely to maintain their intellectual abilities and to be generally happier and better adjusted. "The point is, you need to do both," Cohen says, "Intellectual activity actually influences brain-cell health and size." [br] When people are engaged in a mental activity, they ______.
选项 A、become much wiser
B、are generally happier
C、will be more careful about what they are doing
D、will have a good memory
答案 C
解析 参见文章第一段第一句，句中的“to act more effectively in cognitive areas such as attention and memory(在注意力和记忆力等认知方面表现得更好)”，不等同于 A项中的“become wiser”，也不等同于D项中的“have a good memory”，它的意思是“使某人更全神贯注于某事”，因此C项正确。
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