—I'll never understand how it _____ that he still insisted on going there alone after being told about the possible danger.

—Don't worry. He just likes taking adventure.

A. came about    

B. came across

C. came out    

D. came up

针刺治疗疾病的手法，总的归纳为

A．补虚泻实

B．提插补泻

C．开合补泻

D．补法与泻法

E．平补平泻