问题 问答题 简答题

简述良、恶性胃溃疡的X线鉴别诊断要点。

答案

参考答案:

良、恶性胃溃疡的X线鉴别要点如下表。

良、恶性胃溃疡X线鉴别要点

                                 良性胃溃疡                                        恶性胃溃疡

溃疡口部             光滑整齐,项圈征、狭颈征      不整齐,半月征、指压征、裂隙征

溃疡位置             突出于胃轮廓之外                            位于胃轮廓之内

溃疡环堤                    无                                                         有

周围黏膜             放射状集中                                    增粗或破坏、中断

多项选择题
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根据短文内容,从短文后的选项中选出能填入空白处的最佳选项。选项中有两项为多余选项。

     Speaking in public is most people's least favorite thing. The reason is that we are all afraid of making fool

of ourselves. 1_____.

     But stop biting your finger-nails. Public speaking is easy. It's just plain talking, and you talk all the time.

Although I'm basically shy (honest!). I've been making speeches and talking on radio and television for more

than 30 years. And I can tell you that public speaking is not a "gift" like musical talent, so 2_____. Here are

some of the lessons I have learned:

     Your audience is going to go away with one or two of your main ideas. One or two. Not ten or twenty.

3_____. And if you don't have a clear idea of what you want to say, there's no way your audience will.

4_____-how you are going to open, what major points you want to make and how you're going to close.

     When I do a radio or TV piece, I often write the last sentence first. 5_____. A strong close is critical; the

last thing you say is what your audience will most likely remember.

     The standard length of a audio-visual act is usually 12 minutes. If all those performers singing and dancing

their hearts out couldn't go on longer without boring the audience, what makes you think you can?

A. Some people are born to be good at making speech

B. Anybody who can talk can speak in public

C. Try to relax yourself before making the speech

D. The more important the speech is, the more frightened we become

E. If you can't express in a sentence or two what you intend to get across, then your speech is not focused

     well enough.

F. When you know where you're heading, you can choose any route to get there

G. No matter how long or short your speech is, you've got to get your ideas organized.