|
问一道CR题，OG第10版 87题。totaly不明白答案在讲什么？哪位高手解释一下？
87. In tests for pironoma, a serious disease, a false positive result indicates that people have
pironoma when, in fact, they do not; a false negative result indicates that people do not
have pironoma when, in fact, they do. To detect pironoma most accurately, physicians
should use the laboratory test that has the lowest proportion of false positive results.
Which of the following, if true, gives the most support to the recommendation above?
(A) The accepted treatment for pironoma does not have damaging side effects.
(B) The laboratory test that has the lowest proportion of false positive results causes the
same minor side effects as do the other laboratory tests used to detect pironoma.
(C) In treating pironoma patients, it is essential to begin treatment as early as possible,
since even a week of delay can result in loss of life.
(D) The proportion of inconclusive test results is equal for all laboratory tests used to detect
pironoma.
(E) All laboratory tests to detect pironoma have the same proportion of false negative
results.
答案是E，一下是解释，俺看了解释也不明白，请高手赐教
87.
The most accurate test for pironoma would be the one with the fewest false results. If all tests
have the same proportion of false negatives, then the most accurate is the one that has the
lowest proportion of false positives. Thus, E supports the recommendation and is the best
answer.
Choice A and C deal with the treatment for pironoma and are irrelevant to the accuracy of tests
pironoma. Choice B deals with the side effects of tests for pironoma, and does not address
their accuracy. That the proportion of inconclusive test results is equal for all tests (choice D)
leaves open the question of which test is more accurate, since it does not indicate which test
has fewest false results.
| 
京公网安备11010202008513号 京ICP证101109号 京ICP备12012021号
发表于 2006-4-21 19:06:00
楼主