单选题 A 16-year-old girl comes to the school nurse complaining of cramps, backache, and nausea with her periods. The nurse most likely would interpret these symptoms as which of the following?
A. Pathologic.
B. Physiologic.
C. Psychogenic.
D. Psychosomatic.

【正确答案】 B

【答案解析】The basis for these symptoms is most likely physiologic. There are two types of dysmenorrhea, primary and secondary. Primary, the most common type, is believed to be caused by an increased level of prostaglandins producing uterine hyperactivity and contractions.