翻过历史帖子没有~GWD17-Q23

jyw0411lsq

23. GWD17-Q23:

Because visual inspection cannot reliably distinguish certain skin discolorations from skin cancers, dermatologists at clinics have needed to perform tests of skin tissue taken from patients.At Westville Hospital
, dermatological diagnostic costs were reduced by the purchase of a new imaging machine that diagnoses skin cancer in such cases as reliably as the tissue tests do.Consequently, even though the machine is expensive, a dermatological clinic in Westville is considering buying one to reduce diagnostic costs.


Which of the following would it be most useful for the clinic to establish in order to make its decision?



A.Whether the visits of patients who require diagnosis of skin discolorations tend to be shorter in duration at the clinic than at the hospital

B.Whether the principles on which the machine operates have been known to science for a long time

C.Whether the machine at the clinic would get significantly less heavy use than the machine at the hospital does

D.Whether in certain cases of skin discoloration, visual inspection is sufficient to make a diagnosis of skin cancer

E.Whether hospitals in other parts of the country have purchased such imaging machines
答案是C ，虽然蒙对了，但是觉得C里面貌似无关啊，题目不是说climic 的事情么，这里面 怎么和医院比较起来了么？太诡异了，我一看到出现新词hospital , heavy use就想排除了，（无关），求救下CDer们的思路！

Cathy621

同问A选项！！

-- by 会员 sallyremy (2011/10/27 14:58:44)

我觉得A选项错的原因是 不知道各自去的H和C的patient的总数。所以无从比较。我之前也选的A~

路宇希

题干里就从HOSPITAL推到CLINIC。所以正确答案是这两者的联系也无可非议了。

sallyremy

同问A选项！！

ljwsophie12

恩，第一次做也是审题不认真。没有发现clinic 和hospital不一样

perain

晕倒，没看到clinic和hospital，看题太不仔细了。。。。
是C没错

lasiaberyl

A 说visits to be shorter in duration, so is this means that visitors who need this service would be less than in hospital?  If this is the case, then the use of the machine will be less, thus the costs can not be saved in clinic,right?

How to determine A isn't the correct answer?

像风一样离去

up

jyw0411lsq

这次真的明白了，原来审题问题很大啊
谢谢LS的解释

sdcar2010

Premise: At Westville Hospital, dermatological diagnostic costs were reduced by the purchase of a new imaging machine.
The question: Should a clinic in Westville buy the same machine to reduce cost?

A hidden assumption is that the more times a machine is used to run a test, the more money saved by running the machine than by using a conventional test. Like all capital purchase, the high starting cost of buying an expensive machine can be compensated over time by cutting the cost of running the same assay over and over again.

If the answer to choice C is YES, then the machine will be under used in the clinic. Thus it is less likely to save money for the clinic to buy the machine.

If the answer to choice C is NO, then the machine will not be under used in the clinic, when compared with that in the hospital. Thus it is very likely that the clinic will reduce cost by purchasing the machine. In other words, the machine (apple) in the clinic is the same as the machine (another apple) in the hospital. Therefore, the clinic will reduce cost just like the hospital if the clinic buys and uses the machine similarly.