第28题: [单项选择]A. The results of the studies were convincing. B. The ways the studies were done were strange. C. The subjects of the studies were not reliable. D. The researchers of the studies were not objective enough. 参考答案:B 答案解析:[解析] Which of the following about the studies is true according to the passage
第34题: [单项选择]人民警察的任务有()。 A. 保障改革开放 B. 从群众中来到群众中去 C. 保护公共财产 D. 维护人民的利益 参考答案:C
第35题: [单项选择]患者男性,68岁,一个月前无明显诱因出现尿黄、腹胀、腹痛。超声示肝内未见明显占位,肝内胆管扩张,胆囊增大,胆总管内径2.5cm,末端可见2.2cm×1.5cm的低回声,形态不规整,胰腺未见明显异常,下述说法不正确的是()。 A. 该患者为梗阻性黄疸 B. 胆总管下段癌和壶腹癌在声像图上鉴别困难 C. 根据胆管扩张的范围一般可作出梗阻部位的判断 D. 胆囊不一定均增大 E. 胆总管扩张则一定存在梗阻 参考答案:E 答案解析:肝内外胆管扩张是超声判断胆道梗阻的标志,胆管扩张提示有梗阻,而胆管不扩张提示为非梗阻性黄疸。由于胆总管下段癌和壶腹癌在声像图上鉴别困难,故可统称为壶腹部癌。胆囊与胆总管处于矛盾的张力状态,提示胆囊颈部