关于泪腺上皮性肿瘤，错误的是（）。

A.良性者称为泪腺混合瘤

B.常为双侧发病

C.一般不做术前活检

D.恶性者以泪腺腺样囊腺癌多

E.手术切除时若包膜穿破则易复发

Mr. Norman has raised some interesting points, but there's one thing he has completely failed to _____. [      ]

A. block out

B. account for

C. stand for

D. come up