慢性胰腺炎CT显示胰腺导管的特征性改变为（）
A.狭窄
B.扩张
C.平行双轨
D.不规则串珠状
E.以上均不是
参考答案：D
解析：多数慢性胰腺炎病例CT可显示不同程度的胰管扩张，可累及整个胰管，也可局限于某部较显著；可表现为均匀性管状扩张，也可为狭窄与扩张交替存在呈串珠状表现。串珠状扩张的胰管较多见于慢性胰腺炎症；管状扩张在炎症与肿瘤均可见到。
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| Paul received an expensive car from his brother as a Christmas present. On Christmas Eve Paul saw a dirty and poorly-dressed boy walking 1 his shining car. "Is this your car, Paul?" he asked. Paul told him how he got the car and the boy was 2 . "You mean your brother gave it to you and it didn't cost you nothing? Boy, I wish…" he said, without 3 his sentence. Paul thought the boy wished he had a 4 like that. But what the boy said surprised Paul greatly. "I wish," the boy went on, "that I could be a brother like that." Paul looked at the boy in surprise. He invited him to take a 5 in his car and the boy agreed happily. After a short ride, the boy turned and with his eyes 6 said, "Paul, would you mind driving in front of my house?" Paul smiled a little. He thought the boy wanted to 7 his neighbors that he could ride home in a big car. But Paul was wrong 8 . The boy ran back into his house, and after a short while came back with his disabled brother in his arms. He 9 him down on the step and pointed to the car. "There she is, Buddy, just like what I told you upstairs. His brother gave it to him for Christmas and it didn't 10 him a cent. Some day I'm going to give you one just like it." | ||||
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