问题
单项选择题
食管贲门失弛缓症与食管下端癌的鉴别要点是
A．狭窄上方食管明显扩张
B．食管蠕动减弱或消失
C．狭窄段黏膜完整，管壁柔软
D．钡剂通过缓慢
E．扩张食管内出现液平
答案
参考答案：C
解析：食管贲门失弛缓症狭窄段黏膜完整，管壁柔软；而食管下端癌管壁僵硬，癌灶近端与正常分界截然，狭窄段呈硬管状，走行不自然成角，狭窄段内黏膜消失。
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食管贲门失弛缓症与食管下端癌的鉴别要点是
A．狭窄上方食管明显扩张
B．食管蠕动减弱或消失
C．狭窄段黏膜完整，管壁柔软
D．钡剂通过缓慢
E．扩张食管内出现液平
参考答案：C
解析：食管贲门失弛缓症狭窄段黏膜完整，管壁柔软；而食管下端癌管壁僵硬，癌灶近端与正常分界截然，狭窄段呈硬管状，走行不自然成角，狭窄段内黏膜消失。
Some years ago, Chinese high school students would show their new schoolbags , new clothes or new pens to their classmates when the new term started . Today, however , all have . If you still come back to school only these things , you are falling out-of-date(过时的) . Students in big cities like to bring the latest high-tech things to school, and feel happy and to show off these things to . Mobile phones, MP3 players , CD players , electronic dictionaries , the list is endless . Young people think that , living in the 21st century , they must keep up with the . They don't want to fall . Besides, they think they need to keep in touch with their classmates , so they need mobile phones . They also like to the pop music , so they need CD players . They explain that, like electronic dictionaries , these can be in their study , . They think that their parents should understand they want these things . Foreign students will also bring some latest high-tech things when they to school at the beginning of a new term. , they often use the money which they made by themselves during the holiday to these high-tech things that they want .
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