段首在表达主旨时应该更深入而不是将段首的话简单地复述一遍。如: (2014北京) Evaluating Sources(来源)of Health Information Making good choices about your own health requires reasonable evalua-tion.A key first step in bettering your evaluation ability is to look carefully at your sources of health information.Reasonable evaluation includes knowing where and how to find relevant information,how to separate fact from opinion,how to recognize poor reasoning,and how to analyze infor-mation and the reliability of sources.　1     Go to the original source.Media reports often simplify the results of medi-cal research.Find out for yourself what a study really reported,and deter-