OG CR 108?

christina414

请问高手OG中CR108题，怎么解释？

万分感激！

Growingwqy

同问，哎，09年的帖子我给搜出来了。。。

jake1

能否把原题敲上？手头没带OG

米样

108.    Although custom prosthetic bone replacements produced through a new computer-aided design process will cost more than twice as much as ordinary replacements, custom replacements should still be cost-effective. Not only will surgery and recovery time be reduced, but custom replacements should last longer, thereby reducing the need for
further hospital stays.
Which of the following must be studied in order to
evaluate the argument presented above?
(A)    The amount of time a patient spends in surgery
versus the amount of time spent recovering
from surgery
(B)    The amount by which the cost of producing
custom replacements has declined with the
introduction of the new technique for producing
them
(C)    The degree to which the use of custom
replacements is likely to reduce the need for
repeat surgery when compared with the use of
ordinary replacements
(D)    The degree to which custom replacements
produced with the new technique are more
carefully manufactured than are ordinary
replacements
(E)    The amount by which custom replacements
produced with the new technique will drop in
cost as the production procedures become
standardized and applicable on a larger scale

前提：C换骨的费用比普通换骨的两倍还要多
论点：C换骨仍然很经济
论据：不仅仅手术时间和恢复时间减少了，而且C换骨用得更久，因此减少长期住院的需要。

对C换骨的成本分析主要是从三方面看的：手术、恢复、重复手术（C换骨用得更久，可见重复手术的概率低）。而重复手术的成本覆盖了以上三种成本，因此，两种换骨方法的重复手术概率，是C换骨是否经济的重要evaluation。