Feel tired lately? Has a doctor said he can’t find anything wrong with you? Perhaps he sent you to a hospital, but all the advanced equipment there shows that there is nothing wrong with you.
Then , consider this: you might be in a state of sub - health （亚健康）.
Sub - health, also called the third state or gray state, is explained as a borderline state between health and disease.
According to the survey by the National Health Organization, Over 45 percent of sub - healthy people are middle-aged or elderly. The percentage is even higher among people who work in management positions as well as students around exam week.
Symptoms （征兆）include a shortage of energy, depression, slow reactions, insomnia （失眠）and poor memory , Other symptoms include shortness of breath, sweating and aching in the waist and legs.
The key to preventing and recovering from sub - health, according to some medical experts, is to form good living habits, ale mate work and 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 elements - vitamins and trace elements - 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 sub - health.
小题1:When you are in a state of sub - health, you should________.
A．stay home and keep silent
B．go to a doctor and buy some medicine
C．not consider it very serious
D．find out the reasons and relax yourself小题2:Middle - aged people may be easy to get sub - healthy because________.
A．they have used up their energy
B．they have lost their living hopes
C．they have more pressure in life and work.
D．they have changed their way of life小题3:The key to preventing you from falling into a state of sub health is to________.
A．keep on working regularly
B．go to sleep a bit earlier
C．form good living habits
D．take medicine if necessary小题4:As for food, experts suggested that________.
A．we should never eat meat
B．we should have variety of food
C．we should eat less than usual
D．we should have meals without sugar小题5:The underlined word “alternate” in this passage is closest in meaning to________
A．arrange by turns
B．cause to take place
C．make up for
D．keep away from
小题1:D
小题2:C
小题3:C
小题4:B
小题5:A
题目分析：文章介绍了有关亚健康的问题，包括什么是亚健康，常出现亚健康的人群，亚健康的症状以及避免亚健康的方法。
小题1:D细节理解题。第五自然段The key to preventing and recovering from sub-health is to form
good living habits-----,大意为：阻止亚健康或从亚健康中恢复的关健是形成良好的生活习惯，合理安排工作和休息，有规律的锻炼身体，积极的参加户外活动。由此可知当你处于亚健康的时候就是要找出原因使自己放松。故答案应为D。
小题2:C细节理解题。The percentage is even higher among people who work in management positions as well as students around exam-week.中年人患亚健康的比率达到百分之四十五，这一比率在做管理的人群和经常考试的学生当中比率会更高，由此可知亚健康与工作的强度和压力有关，故答案应为C，在生活和工作中这一群的压力是更大的。
小题3:C细节推理题。由The key to preventing and recovering from sub-health is to form good living habits-----可知，要阻止亚健康的关健是形成良好的生活习惯。本句的句意为：阻止亚健康或从亚健康中恢复的关健是形成良好的生活习惯，合理安排工作和休息，有规律的锻炼身体，积极的参加户外活动。故答案应为C。
小题4:B细节理解题。由最后两段专家建议食用的食物种类可以知道，要想预防亚健康需要各种膳食均衡摄入，不能挑食。故答案应为B。
小题5:A词义推测题。over 45 percent of sub-healthy people are middle-aged or elderly. The percentage is even higher among people who work in management positions as well as students around exam-week.句意为百分之四十五中年人患有亚健康，管理人员与学生会更高，由此可知工作的压力大的环境患亚健康的可能性更大。exercise regularly, take part in open air activities要有规律的锻炼和积极参加户外活动。由此两部分可知要避免亚太健康由合理的安排好工作和休息。故alternate的意思应为安排的意思，答案应为A。
考点:健康保健类文章的阅读理解。