Quite a few people like traveling, for it can increase their knowledge and broaden their _____．

A．features

B．horizons

C．heritage

D．reservations

出血较多，不易缝合的为（）

A.会阴侧切术

B.会阴正中切开术

C. * * 后穹隆穿刺术

D.人工胎盘剥离术

E.胎头吸引术