Where can you probably see the sign that means "NO PHOTOS"? [ ]

A. In the hospital.

B. In the museum.

C. In the school.

D. In the library.

患者女性，51岁，风心病二尖瓣狭窄并关闭不全20年，房颤4年。无高血压及高脂血症病史。3h前在家做饭时突然跌倒在地伴失语。最可能的原因是（）。

A.脑出血

B.脑血栓

C.脑动脉硬化

D.脑血肿

E.脑栓塞