本段小结一下：主题+主题定义+主题根据。出题点不可能问主题是什么(都告诉我们了还考什么啊！一定是考紧跟其后的主题定义或者主题根据，又由于主题定义作者给的非常清楚明白，因此，重点出题点可能在主题根据)

　　With thousands of career-related sites on the Internet, finding promising openings can be time-consuming and inefficient. Search agents reduce the need for repeated visits to the databases.[讲了PSA的优势1：省时高效] But [刚才是PSA的优势，看到转折词，应该提醒自己了，要说劣势了]although a search agent worked for Redmon, career experts see drawbacks.[很好，和我们预期的一样，连专家都说有缺点了] Narrowing your criteria[讲劣势1，之后显然是“拉虎皮做大旗”，用专家的话来证明其劣势], for example, may work against you: “Every time you answer a question you eliminate a possibility.” says one expert.

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