本文選自雅思聽力Section 4，難度較大
Summary:本節(jié)是一個研究人員對于所進行的關于醫(yī)療體系的研究的陳述。她通過不同國家的研究生用調(diào)查問卷的方式進行研究，而且只調(diào)查18歲以上且正在工作的男性。研究的群體月集中，結果就越精確。在調(diào)查中確實獲取了很多有趣的信息。
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And one of the first-year students I interviewed wanted reassurance that no names would be traceable from the answers. I was so surprised, because they think nothing of telling you about themselves and their opinions in seminar groups. Then, one of the people that I work with got a bit funny. As the questions were quite personal and one minute he said he'd do it, then the next day he wouldn't, and in the end he did do it. It's hard not to get angry in that situation but I tried to keep focused on the overall picture in order to stay calm. The most bizarre case was a telephone interview I did with a teacher at a university in France. He answered all my questions in great detail, but then when I asked how much access he had to dangerous substances he wouldn't tell me exactly what his work involved. It was a real eye-opener.