3. 答案

　　B

　　解析

　　推理判断题。纵观全文可知本次研究主要是通过对相关数据的分析完成的。

　　4. 答案

　　D

　　解析

　　细节理解题。根据文章最后一段的相关描述可知，失业的女性病人对交通拥堵的反应最敏感。

　　China’s funemployed graduates “gnaw(啃；咬) on the old”. They don’t want to work in factories or farms, but at the same time, the white-collar lifestyle remains far out of reach.

　　For the 7.27 million Chinese students who graduated from college last year — a number roughly 2.5 times the US figure — the job market can be serious: low salaries, long hours and the knowledge that there are millions of other people just waiting to replace you. Those realities look even harsher when you compare the bargain-basement salaries earned by the average Chinese young adult with the exorbitant(过高的) wealth of China’s well-connected.

　　Growth in decent (体面的) jobs has lagged (落后) far behind the non-stop bumper (丰盛的) crops of college graduates, and competition for scarce positions often comes down to family connections and cold hard cash. China is almost two years into one of its most intense corruption crackdowns in decades, but young Chinese job-seekers still report being extorted for huge sums of money that dwarf their would-be salaries.

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