Don't stay up too late， ________ you'll find it hard to get up on time tomorrow. [ ]

A) or        

B) but

C) and

D) so

泪腺腺样囊性癌（）

A.泪腺区实性肿块，边界光整，泪腺窝扩大，骨质受压变薄

B.泪腺区囊实性肿块，边界不规则，泪腺窝区骨质破坏

C.泪腺增大，边界欠请，临近眼外肌增粗

D.泪腺区不规则肿块，呈长扁平形，包绕眼球，邻近骨质无改变

E.泪腺区囊性低密度肿块，内含脂肪成分，边界清楚，无强化，局部骨质破坏