16、硅结节的直径是

A、0.5～lmm                                                       B、1～1.5mm

C、1.5～2mm                                                       D、2～5mm

17、诊断慢性浅表性胃炎时，下列哪项有意义的?

A、肠上皮化生                                                    B、黏膜腺体减少

C、固有层中性粒细胞浸润                                   D、炎症限于粘膜浅层

18、慢性胃溃疡发生率最高的并发症是

A、出血                                                               B、幽门狭窄

C、癌变                                                               D、穿孔

19、肝硬变晚期腹水的形成原因中，下列错误的是

A、血中抗利尿激素水平增高                               B、门静脉高压

C、白蛋白合成减少                                             D、对醛固酮的灭能作用增强

20、肾盂肾炎主要感染的病原体是

A、霉菌                                                               B、寄生虫

C、病毒                                                               D、大肠杆菌