1.熟读并理解课文，重点掌握以下句子：

1）These demandsarise from the rapid growth of the fetus，enlargement of the uterus and its supporting structures，mammary glands，and placenta；increase in the maternal circulating blood volume and the subsequentdemand for increased amounts of plasma protein to maintain colloidal osmoticpressure；and formation ofamniotic fluid. The fetus has the first choice of nutrients，but the pregnant woman must make sure that thefetus has something worthwhile to choose from.

2）Iron supplementsare best absorbed on  an empty stomach；thus they can be taken between meals withbeverage other than milk，tea，or coffee. Sideeffects of iron supplements involve mild stomach discomfort and constipation. For the women with gastrointestinaldiscomfort，a good time forthem to take iron supplements is just before bedtime.

3）Sexualintercourse is safe throughout pregnancy for a woman without vaginal bleeding，pain，leakage of amniotic fluid，or uterine contractions. In such cases，sexual intercourse should be avoided. The women should be advised tourinate before and after intercourse，and then drink a large glass of water in case of urinary tract infection.

2.学会用英文评估患者的疼痛。