2. 外语
  3. A study found that the radiation from CT scans—the tests regularly used to(1)_____ internal injuries or signs of cancer—is likel

A study found that the radiation from CT scans—the tests regularly used to(1)_____ internal injuries or signs of cancer—is likel

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问题     A study found that the radiation from CT scans—the tests regularly used to(1)_____ internal injuries or signs of cancer—is likely(2)_____ for 2 percent of cancer cases in the United States.
     (3)_____ lots of Americans undergo CT scans, that research is unlikely to(4)_____ in doctors’ offices: Two-thirds of patients in a new JAMA study reported(5)_____ nothing of the risks of the diagnostic procedure.(6)_____, 17 percent felt like they played an active role in a discussion(7)______, whether this diagnostic test was the best path forward.
    "Our study indicates that most decisions to undergo outpatient CT are(8)_____ by physicians and risk communication is(9)______," a team of researchers led by University of Colorado’s Tanner Caverly writes. "The risk communication that took place had limited(10)______: respondents who recalled discussing the benefits and risks of imaging did not have better(11)_____."
    Would a conversation about the(12)_____ risks have made a difference? Caverly’s team asked a few other questions(13)_____ suggest it would: Patients undergoing the scan have little idea about the radiation(14)_____. One-quarter self-identified radiation as a risk of a CT scan; 37 percent were able to identify CT scans as having a higher level of radiation(15)_____ a chest x-ray.
    There’s a growing movement in medicine right now to(16)_____ on unnecessary treatment or (17)_____ of care. Much of this has been led by a group called Choosing Wisely, which has(18)_____ with dozens of medical societies to come up with lists of (19)_____ that doctors themselves don’t think they ought to be using.
    One of their key messages is that more care isn’t necessarily better; all medicine comes with some level of risk. That message does not,(20)______, seem to be delivered in the doctor’s offices studied here.
(3)
选项 A、When
B、While
C、Unless
D、If
答案B
解析 此处填入连词，表明前后句子的逻辑关系。前句讲很多美国人在接受CT扫描。后句讲这项研究不太可能出现在医生的办公室，前后形成对照。while可表对照关系。故选B。
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