He speaks English well indeed, but of course not___________a native speaker.

A． as fluent as

B． more fluent than

C． so fluently as

D． much fluently than

良性前列腺增生案例：

病例摘要：患者，男性，45岁，无痛性肉眼血尿6个月来诊。患者于6个月前无意中发现排尿全程尿色发深，呈酱油色，无腰痛、尿频、尿急、排尿痛。既往体健。查体：右腰部轻微叩痛，无腹部压痛、反跳痛、肌紧张。实验室检查：尿常规：BLD500Ery。