The small victories in the fight against poverty and hunger have helped many people who are in trouble 　　　　 allowing them to maintain dignity.

A．before

B．after

C．for

D．while

在狭窄骨盆中发生胎儿窘迫的主要原因是：

A．手术助产机会大

B．胎儿宫内感染

C．胎儿慢性缺氧

D．胎膜早破，脐带脱垂

E．产程延长，胎头受压