This school was _____ in 1950 and has a history of nearly sixty years.[ ]

A. got up

B. set up

C. sent up

D. taken up

患者男性，56岁，无明显自觉症状，出现无痛性肉眼血尿。超声特征：左肾实质内可见一5cm左右低回声不均匀实质性肿块，表面呈分叶状，内部及周边均可探及较丰富血流信号，肾窦受压变形。本病可诊断为（）。

A.肾脓肿

B.肾结核

C.多囊肾

D.肾囊肿

E.肾癌