社会制度、法律、规章制度、守则和纪律等，属于_________规则。
正式的
Which of the following situations is more likely to predispose a client to postpartum hemorrhage
A．Birth of a 7 lb (3,175g) infant.
B．Prolonged first stage of labor.
C．Pregnancy-induced hypertension (PIH).
D．Birth of twins.
