2001年医学博士英语作文 C9`x"$
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Writing Drill Smoking and Health )x&>Cf<,
It is not until recently that smoking has been firmly proved to be hazardous to health. It irritates the throat and respiratory passages. It sometimes leads to poor appetite, nausea, short breath, and irregular heartbeat. More importantly, smoking is associated with chronic and fatal diseases of respiratory tract. Evidence shows that smokers are more likely than nonsmokers to develop cancer of the lungs, throat, tongue, and jaw, emphysema and bronchitis as well. As a result, many nations have made enormous efforts to warn people of the dangers of smoking. rf2-owWN
While smoking, particles of tobacco tar and smoke slow down the work of cilia. The tar collected in the lungs can cause cancer. Moreover, nicotine in tobacco can be simulating by affecting various centers on the medulla oblongata region of the brain. It can affect other physiological process that in turn affect the respiratory center in the brain. It can also influence other centers that slow down the action of the heart, constrict the arteries, and cause vomiting. [sG!|@r
In brief, smoking does nothing but harm to people’s health. Therefore, smokers of any age or kind should try to give it up. 9q<?xO
这篇短文的主旨是说明吸烟对健康危害及造成危害的原因,通读全文,根据其要点可以分为四个部分:1)吸烟有害;2)吸烟有哪些具体的害处;3)为什么吸烟会有害,亦即其致害机理是什么;4)总结:吸烟有害要戒烟。 be&,V_F
总之,摘要写作时切忌“见木不见林”,要体现出层次感,结构要明快,这样可以向阅卷老师表明你的逻辑。