问题 单项选择题

患者男,40岁,右上腹痛,发热3天,体温38.5~39.5℃,入院前突然呕血,量约600ml,巩膜轻度黄染,肝区叩击痛明显,半月前曾行钡餐造影,食管、胃、十二指肠均阴性,病因最大可能是()

A.十二指肠溃疡出血

B.出血性胃炎

C.胆道出血

D.小肠部肿瘤

E.肝门脉高压症

答案

参考答案:C

解析:胆道出血是胆道疾病和胆道手术后的严重并发症,也是上消化道出血的常见原因。胆道大量出血的典型临床表现为三联症:①胃肠道出血(呕血、便血);②胆绞痛;③黄疸。故答案应选C。

选择题
阅读理解

阅读理解。

     Several years ago, the mayor of Chicago, Illinois, visited Germany, a leader in green roof design. Later he decided to have vegetation planted on Chicago City Hall. Today, the tops of many other buildings also

look like parks. In Canada, the Coast Plaza Hotel in Vancouver has a forest on its roof. New York City

has an unusual example farm for hydroponics. The farm is on a boat called the Science Barge. Rainwater

and river water are used to grow lettuce, tomatoes, cucumbers and peppers. The farm shows the

possibilities for designing rooftop systems.

     Green roofs are designed to save energy and capture rainwater. Rooftops covered with plants help

keep buildings cool. They can extend the life of a roof. And they can reduce water running off into streets

and storming water systems.

     Experts say green roofs usually do not get much above 27℃. So temperatures might not be a problem for growing. But rooftop gardeners have to be careful not to put too much weight on the roof. This is true whether plants are grown in soil or water.

     Earlier in 2008, researchers in Texas reported that green roofs can reduce a building's air conditioning

costs by about one fifth compared to blacktop roofs. But they also reported that not all green roofs

perform equally well. They found that designs differ in their ability to keep buildings cool and to capture

rainwater. The researchers put experimental roofs on top of metal insulated (隔热的) boxes, to recreate

green roof conditions. The study compared products from six companies to help businesses understand

how to improve their designs. Each rooftop had sixteen different kinds of plants native to Texas. The

researchers say the presence of native plants likely helped all the green roofs capture water better

compared to sedums. Sedums are plants that need little water and often are used on green roofs. The

native plants could take in more water and release more of it to the atmosphere.

1. The author gave Paragraph 1 to _____.

A. tell us what is green roof design

B. tell us Germany is the country that leads or guides the  green roof design

C. introduce some famous hotels in the world

D. lead to the topic of the passage 

2. The advantages of green roofs are mentioned in the passage  EXCEPT _____.

A. changing the local weather

B. prolonging the roof's life

C. keeping the house cool

D. reducing the house's air conditioning costs

3. According to the passage, which conclusion is WRONG?

A. Sometimes green roofs may break down the house.

B. Not all the green roofs can reduce the building's air  conditioning costs equally.

C. Different designs of green roofs have different effects on buildings.

D. Sedums are a kind of plants native to Texas.

4. The experiment is mentioned in the last paragraph _____.

A. to find out how many different plants in Texas

B. to show us how to design green roofs

C. to introduce a kind of roof made of metal

D. to provide proofs to improve the design of green roofs