胆道疾病首选的影像学检查是（） A.X线 B.ERCP C.B超 D.经_爱下问搜题

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问题单项选择题 A1/A2型题

胆道疾病首选的影像学检查是（）

A.X线

B.ERCP

C.B超

D.经皮肝穿刺胆管造影

E.CT

答案

参考答案：C

解析：X线、ERCP、经皮肝穿刺胆管造影以及CT虽然均是胆道疾病检查的手段，但对机体都有一定损伤，而B型超声属于无创性检查，是一种安全、快速、简便、经济而准确的检查方法。可明确胆道结石的位置、性状及大小，亦可明确胆管有无扩张、扩张部位及程度，还可诊断胆管肿瘤、胆道蛔虫及先天性胆道疾病，是胆道疾病首选的检查，故正确答案为C。

单项选择题

下列哪项与治疗胎儿窘迫无关()。

A．给产妇吸氧

B．给50%葡萄糖加维生素C

C．静点尼可刹米或山梗菜碱(洛贝林)

D．纠正酸中毒

E．注射维生素K

完形填空

No one would be willing to pay one-third of the price for the packaging or wrapping of what he or she purchases. But over-packaging has become a disease that leads to an __50__ waste of resources and __51__ environmental pollution.
The wasted packaging materials are __52__ to be worth about 280 billion yuan annually. And such packages and wrappings thrown away by customers __53__ up half of the volume of solid waste in cities. __54__, it is high time that regulations were __55__ to stop enterprises from spending too much on unnecessary packaging and wrapping.
To produce paper packaging or wrapping, many more trees have to be cut down. Over-packaging also limits the interest of consumers when they have to spend quite a high percentage on something that they will have to throw into the dustbin. The simple truth is that the more a producer spends on packaging, the __56__ the products it sells will be.
Product packaging and wrapping used to be very simple 30 years ago. "Shabby" was the word many had used to __57__ the way Chinese products were packaged. And shabby packaging was blamed for making Chinese products __58__ in the international market.
It is __59__ to pay enough attention to packaging or wrapping products in such a manner that they can be __60__ to customers' eyes. But that does not definitely justify that packaging should even outshine what is inside.
In the Chinese proverb, “maidu huanzhu,” the buyer returns the pearl and just keeps the case because the __61__ is too fancy and luxurious. It not only laughs at the poor __62__ of the buyer, but also criticizes the unnecessary __63__ the seller has made in making the case. Another message from the proverb is that over-packaging helps cultivate an __64__ consuming attitude - to buy fancy-looking stuff but not what they really need.

A．results from

B．contributes to

C．acknowledged

D．Furthermore

B．more expensive

D．more useful

C．unattractive

C．unnecessary

A．contributions

D．unavoidable