简述“三三制” * * 的性质及施政特点。

A 19-year-old primigravida is admitted to the labor and delivery unit in labor. She’s 2 cm dilated and 50% effaced, and the fetal head is at 0 station. She’s having moderately p 40-second contractions every 5 minutes. She seems rather anxious and becomes very tense during each contraction. When the client asks for pain relief, what should the nurse do next ？（）

A．Determine the source of her anxiety and institute interventions to help her relax.

B．Immediately check the physician’s order and give her the analgesic ordered.

C．Inform her that the neonate’s head isn’t down far enough just yet but that, as soon as it is, medication will be given.

D．Tell her that her contractions are only moderately p and that she should wait until later to take medication.