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  3. Feeling tired lately? Has the doctor said he cannot find anything wrong with you? Perhaps he sent you to a hospital, but all the

Feeling tired lately? Has the doctor said he cannot find anything wrong with you? Perhaps he sent you to a hospital, but all the

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问题     Feeling tired lately? Has the doctor said he cannot find anything wrong with you? Perhaps he sent you to a hospital, but all the advanced equipment there shows that there is nothing wrong.
    Then consider this, you might be in a state of subhealth. (亚健康)
    Subhealth, also called the third state or grey state, is explained as a borderline (临界)state between health and disease. According to an investigation by the National Health Organization, over 45 percent of subhealth people are middle-aged or elderly. The percentage is even higher among people who work in management positions as well as students around exam time.
    Symptoms (症状) include a lack of energy, depression, slow reactions, insomnia (失眠), agitation (焦虑)and poor memory. Other symptoms include shortness of breath, sweating and aching in the waist and legs.
    The key to preventing and recovering from suhhealth, according to some medical experts, is to form good living habits, alternate work with rest, exercise regularly, and take part in open-air activities.
    As for meals, people are advised to eat less salt and sugar. They should also eat more fresh vegetables, fruits, fish, because they are rich in nutritional (营养的)elements—vitamins, and trace elements(微量元素)—that are important to the body.
    Nutrition experts point out that it is not good to eat too much at one meal because it may cause unhealthy changes in the digestive tract(消化道). They also say that a balanced diet is very helpful in avoiding subhealth.  
Middle-aged people may feel subhealth, because______.
选项 A、they have lost their living hopes
B、they have more pressure in life and work
C、they have used up their energy
D、they begin to get older
答案B
解析 此题为推断题。从第三段我们可以知道中年人亚健康的比例超过45%，另外，在经理职位上的人还有面临考试的学生的比例甚至更高些，因此推论出导致亚健康的原因是工作和生活中的压力，故选B。
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