下列胆管癌的影像学检查,其应用价值,正确的是()。 A.B超检查显示扩张的胆管、梗阻

题型:单项选择题 A1/A2型题

问题:

下列胆管癌的影像学检查,其应用价值,正确的是()。

A.B超检查显示扩张的胆管、梗阻的部位,发现肿块

B.PTC显示梗阻部位和管腔受累的范围

C.ERCP可直接观察十二指肠 * * ,造影能显示梗阻远端胆管

D.CT、MRI检查可确定扩张的胆管,梗阻的部位,肝实质有无转移,胆囊是否肿大

E.以上都是

考点:普通外科学(医学高级)胆道疾病胆道疾病题库
题型:单项选择题 A1/A2型题

Some people talk about immigration in terms of politics, some in terms of history. But the core of the matter is numbers. The Labor Department says that immigrants make up about 15 percent of the work force. It’s estimated that a third of those are undocumented workers. The Pew Hispanic Center estimates that one in four farmhands in the United States is an undocumented immigrant, and that they make up a significant portion of the people who build our houses, clean our office buildings and prepare our food.

America has become a nation dependent on the presence of newcomers, both those with green cards and those without. Business leaders say agriculture, construction, meatpacking and other industries would collapse without them.

Sure, it would be great if everyone were here legally, if the immigration service weren’t such a disaster that getting a green card is a life’s work. It would be great if other nations had economies robust enough to support their citizens so leaving home wasn’t the only answer. But at a certain point public policy means dealing not only with how things ought to be but with how they are. Here’s how they are: these people work the jobs we don’t want, sometimes two and three jobs at a time. They do it on the cheap, which is tough, so that their children won’t have to, which is good. They use services like hospitals and schools, which is a drain on public coffers, and they pay taxes, which contribute to them.

Immigration is never about today, always about tomorrow, an exercise in that thing some native-born Americans seem to have lost the knack for: deferred gratification. It’s the educated man who arrived in the Washington D. C., area and took a job doing landscaping, then found work as a painter, then was hired to fix up an entire apartment complex by someone who liked his work ethic. He started his own business and wound up employing others. Does it matter that he arrived in this country with no work visa if he is now supporting the nation’s economy

If any towns, whose aging populations were on the wane before the immigrants arrived, succeed in driving newcomers away, those who remain will find themselves surrounded by empty storefronts, deserted restaurants and houses that will not sell. It’s the civic equivalent of starving to death because you don’t care for the food. But at least everyone involved can tell themselves their town wasted away while they were speaking English.

According to the text, if all the newcomers are driven away from a city, it would be possible that ()

A. the economy would be more prosperous because of convenience of management

B. house lease industry may decline due to lack of customers

C. people in the city may starve to death

D. everyone will involve in the process and cheer for it

题型:单项选择题 A1/A2型题

两种以上药物配伍后,药物原来的体内过程、组织对药物的感受性、药物的理化性质等发生变化而引起药效学和药动学变化()

A.蓄积

B.第二相反应

C.药物相互作用

D.生物等效性

E.酶抑制作用

题型:单项选择题 A1/A2型题

什么是数据库?

题型:单项选择题 A1/A2型题

在问卷调查中,问卷设计是非常重要的一个环节,甚至决定着调查问题的成功与否。问卷设计是一项十分细致的工作,下列选项中不属于一份好的问卷应做到的是()。

A.内容简明扼要

B.信息包含要全

C.问卷问题安排合理

D.问卷问题尽可能详细

题型:单项选择题 A1/A2型题

简述系统性红斑狼疮的治疗原则

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