[求助]GWD 24-22.35

dianluo

各位谁知道那里有讨论GWD24的22和35题阿？

frxiao

你贴出来，大家不就可以讨论了么？

三脚猫

我来贴吧，22我也错了

24-22 Often patients with ankle fractures that are stable, and thus do not require surgery, are given follow-up x-ray because their orthopedists are concerned about possibly having misjudged the stability of the fracture. When number of follow-up x-rays were reviewed, however, all the fractures that had initially been judged stable were found to have healed correctly. Therefore, it is a waste of money to order follow-up x-rays of ankle fracture initially judged stable.

Which of the following, if true, most strengthens the argument?

A)    Doctors who are general practitioners rather than orthopedists are less likely than orthopedists to judge the stability of an ankle fracture correctly.

B)     Many ankle injuries for which an initial x-ray is ordered are revealed by the x-ray not to involve any fracture of the ankle.

C)    X-rays of patients of many different orthopedists working in several hospitals were reviewed.

D)    The healing of ankle fractures that have been surgically repaired is always checked by means of a follow-up x-ray.

E)    Orthopedists routinely order follow-up x-rays for fractures of bone other than ankle bones.

答案选Ｂ，为什么？？没明白，我瞎选了Ｅ

24-35: The milk of many mammals contains cannabinoids, substances that are known to stimulate certain receptors in the brain. To investigate the function of cannabinoids, researchers injected newborn mice with a chemical that is known to block cannabinoides from reaching their receptors in the brain. The injected mice showed far less interest in feeding than normal newborn mice do. Therefore, cannabinoids probably function to stimulate the appetite.

Which of the following is an assumption ok which the argument depends?

A)    Newborn mice do not normally ingest any substance other than their mothers’ milk.

B)     Cannabinoids are the only substances in mammals’ milk that stimulate the appetite.

C)    The mothers of newborn mice do not normally make any effort to encourage their babies to feed.

D)    The mild of mammals would be less nutritious if it did not contain cannabinoids.

E)     The chemical that blocks cannabinoids from stimulating their brain receptors does not independently inhibit the appetite.

答案事Ｅ，这个chemical发挥作用有两个途径：１block cannabinoids;2 独立发挥作用，使得小白鼠没了胃口。因此要确认试验结果是由原因１造成的，就必须确认２不可能，因此答案是Ｅ

[此贴子已经被作者于2005-7-24 1:15:40编辑过]

eray008

24-22：原题的结论是"order x-ray of ankle fracture"是种浪费，加强这个结论

       B选项说：对骨折的关节照x-ray竟然看不出有骨折问题。加强了照片是浪费的结论

不过题目中的确有些不好理解，我把stable fracture理解成严重的骨折情况，stability严重性。因为能不能动弹是判断骨折情况的因素。呵呵

24-35：同意楼上解释。也可以用not成weanken的方法解释。

       如果blocker本身就是影响食欲的，那就很难判断到底是blocker还是cannabinoids在影响食欲

jackie32

这题答案是什么? 标准答案不是C吗?

没看懂C是什么意思

william0707

我选的B,...可答案是C...看不懂...求助

peijiali919

我认为C说的是：病人的X光需要很多医院的不同的整形外科医师一起来会诊，因此这样会大耗金钱，所以有加强的意味，不知道这样理解对不对？

helen_bitw

24-22

结论：对于一开始诊断为Stable的ankle injury，follow-up X-Ray（复检照片）是浪费。（原文里说了，Stable指情况不严重，因此不需要手术。）

问题：支持结论 

选项：

B、很多被要求做XRay初检的踝关节伤，X-Ray显示根本没伤。（连初检都有很多不必要的，何况是被诊断为stable的呢？那复检就更不必要了。所以，B选项加强了结论）

C、不同病人的XRay被不同医院的医生Review。（不同病人的XRay片被不同医生看，也许可以认为是不必要的，但与结论的follow-up XRay没关系，所以不对。）