2 转折关系
　　解题技巧：
　　转折关系常涉及让步状语从句或转折并列句的理解。让步状语从句通常由while或although引导，通常强调的是主句的内容；在转折并列句中，表示转折的词有however,nonetheless,but,yet,on the other hand等，强调的是转折连词后面内容。
　　练习：
　　As we heve seen, the focus of medical care in our society has been shifting frome curing desease to preventing disease — especially in terms of changing our many unhealthy behaviors, such as poor eating habits, smoking, and failure to exercise. The line of thought involved in this shift can be pursued further. Imagine a person who is about the right weight, but does not eat very nutritious foods, who feels OK but exercises only occasionally, who goes to work every day, but is not an outstanding worker, who drinks a few beers at home most nights but does not drive while drunk, and who has no chest pains or abnormal blood counts, but sleeps a lot and often feels tired. This person is not ill. He may not even be at risk for any particular disease. But we can imagine that this person could be a lot healthier.
　　Q: In the paragraph, people are reminded that ______.
　　A. good health is more than not being ill
　　B. drinking,even if not to excess, could be harmful
　　C. regular health checks are essential to keeping fit
　　D. prevention is more difficult than cure
　　答案: 选A。本段最后一句是对倒数第2、3句的转折。这个人没病，但是还可以更健康。所以良好的健康不仅仅是生病，A正确表达了这个含义。