疑为机械性肠梗阻的病例，当腹部平片显示下列何种情况时应考虑有绞窄性肠梗阻的可能性（）
A.近端肠段扩张，远端肠腔未见气体
B.扩张肠段呈梯形排列
C.孤立肠段扩张且较固定
D.扩张肠段黏膜呈鱼刺样
E.空肠、结肠均明显扩张、胀气
参考答案：C
解析：肠梗阻的典型症状为腹痛、呕吐、腹胀、停止排气排便。出现下列表现时应考虑绞窄性肠梗阻：持续剧烈腹痛、有腹膜炎体征、早期出现休克、腹部触及孤立、胀大肠袢、腹穿抽出血性液体、腹部X线示孤立、胀大肠袢、积极治疗症状无明显改善。故答案应选C。
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| When I was 18, one morning, my father told me to drive him into a town, about 18 miles away. I had just learned to drive, so I 1 with pleasure. First we came to the town. Then I took the car to a nearby garage (汽车修理厂) to have it 2 and promised (答应) to pick Dad up at 4 P.m.. Because I had a few 3 to spend, I decided to go to the 4 . However.I became so interested in the films that I forgot the 5 . When the last film finished, it was 6 o'clock. I was afraid Dad would be 6 and never let me drive again, so I drove back 7 to meet Dad and made an excuse for my being late. I'll never forget the 8 he gave me "I'm disappointed (失望的) that you feel you 9 lie (说谎) to me, Jack. I'm angry, not with you but with myself. I have failed 10 I've brought up (抚养) a son who can not even 11 the truth to his own father. I'm going to 12 home now and think seriously about where I have gone wrong all these years." Dad began walking along the road. I begged 13 , telling him how drove 14 him for 18 miles, at a speed of 5 miles an hour. It was the most 15 lesson. I have never lied to him ever since. | ||||
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