23. We should believe ourselves! The brain of these people was as _____ as our own.

A．large and fully developed

B．large and full as developed

C．largely and full as developed

D．large and full developed

男性，55岁。无痛性肉眼血尿3个月，偶伴有面条状血块。尿细胞学检查4次未发现癌细胞，B超可见左肾轻度积水。

如检查发现左肾盂及输尿管中段两处充盈缺损，最可能的诊断是（）

A.肾癌

B.输尿管狭窄

C.肾结核

D.上尿路上皮肿瘤

E.肾及输尿管结石