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患者，男性，31岁。2年前因胃溃疡穿孔行毕I式胃大部切除术。术后半年胃溃疡复发出血行残詈部分切除、胃空肠吻合术，术后上腹仍感烧灼样辱．服用H2受体阻滞剂不缓解，伴腹泻，BAO／MAO=08

为进一步明确疾病部位，最有意义的检查是（）

A.选择性腹腔动脉造影

B.CT检查

C.胃镜检查

D.上消化道造影

E.经皮经肝穿刺门静脉分段取血测胃泌素值

答案

参考答案：E

单项选择题

The fact that most Americans live in urban areas does not mean that they reside in the center of large cities. In fact, more Americans live in the suburbs of large metropolitan areas than in the cities themselves.
The Bureau of the Census regards any area with more than 2,500 people as an urban area, and does not consider boundaries of cities and suburbs.
According to the Bureau, the political boundaries are less significant than the social and economic relationships and the transportation and communication systems that integrate a locale. The term used by the Bureau for an integrated metropolis is an MSA, which stands for Metropolitan Statistical Area. In general, an MSA is any area that contains a city and its surrounding suburbs and has a total population of 50,000 or more.
At the present time, the Bureau reports more than 280 MSAs, which together account for 75 percent of the US population. In addition, the Bureau recognizes 18 megapolises, that is, continuous adjacent metropolitan areas. One of the most obvious megapolises includes a chain of hundreds of cities and suburbs across 10 states on the East Coast from Massachusetts to Virginia, including Boston, New York, and Washington, D.C. In the Eastern Corridor, as it is called, a population of 45 million inhabitants is concentrated. Another megapolis that is growing rapidly is the California coast from San Francisco through Los Angeles to San Diego.

The underlined word "adjacent" in the last paragraph is closest in meaning to ______.

A．beside each other

B．growing very fast

C．the same size

D．densely populated
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判断题

高性能混凝土就是高强混凝土，与耐久性无关。（）
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