【正确答案】正确答案： Depression—a Hidden Blue Depression which is notoriously called as "a hidden blue" in the western countries causes severe situations. The situation of depression in China is also not optimistic. The incidence of depression in our country is about 24%. A new survey shows that the prevalence of depression in China is about 29% -35%, which has been close to the statistical results of developed countries. With the development of society, white-collar workers in big cities such as Beijing, Shanghai and Guangzhou are rapidly becoming under the high threaten of the disease in the stressing and competitive social environments. However, the awareness and cognition of this disease are still exist in limited groups and regions. One instance is only 3% of the patients received proper treatments. So, what on earth causes this disease? Psychiatrists have found that most of the patients are intelligent, radical and sensitive people. There are mainly four reasons. The first one is biochemical factors, such as sudden neural transmission disorder in the brain. The second one is depressive characters, such as diffidence, sensitivity, timidity, pessimism, etc.. The third one is family history, which means it can be inherited from generation to generation. The last one is society's environmental factor such as interpersonal conflicts, stress from work, family conflicts, etc.. In conclusion, depression is characterized by low spirits, slow responses, reduced verbal activities and motions, etc.. So if one want to overcome and recover from this kind of bad mood and negative living styles, he should follow the following tips. Firstly, be realistic and pragmatic in your life goal to avoid depression-causing disappointment. Secondly, learn to give up, which can help you avoid depressing dead-end consequences. Thirdly, trust yourself and your strengths instead of only worrying about your shortcomings. Lastly, love yourself and others, which can help you to realize you are valuable and useful to others. Shortly, be positive and optimistic, relax yourself in any circumstances, which help you avoid being trapped in depression.

【答案解析】解析：审题时要着重注意题目要求，不能遗漏要点和信息，合理组织语言。这是一篇关于抑郁症的说明文，首先要抓住主旨，在第一段将抑郁症在世界上的现状表述出来，说明这类疾病人群扩大的严重性；其次是抓住关键点，分条列出造成抑郁症问题的原因。最后，给出如何能够有效地在生活中预防和治疗抑郁症的建议。