The manager of the travel agency was trying hard to figure out how he would attract more customers ____ an extraordinary idea _____  his mind and he immediately knew what to do.     [ ]

A. when; flashed across  

B. as; crossed  

C. when; hit  

D. before; struck

20岁女性，参加劳动一周后，右肘关节痛，活动用力后加重，右肘外侧压痛，右肘伸肌腱牵拉试验（Mill试验）（+），皮肤无红肿，首选诊断是（）

A.肘关节结核

B.肘关节疲劳骨折

C.肱骨外上髁炎

D.右肘外侧副韧带损伤

E.桡神经损伤