MRI检查未见明显异常。
该病的病理原因最可能为（）
A.退行性改变
B.微血管缺血改变
C.炎症
D.肿瘤压迫
E.先天异常
参考答案：B
Paul is good, kind, hard－working and intelligent; __________, I can’t speak too highly of him.
A．as a result
B．in a word
C．by the way
D．on the contrary
