The parents of a 4-year-old with sickle cell anemia tell the nurse that they would like to have other children, but they’re concerned about passing sickle cell anemia on to them. Which health care team member would be the most appropriate person for the nurse to refer them to

A. Clergy.
B. Social worker.
C. Certified nurse midwife.
D. Genetic counselor.

刀开关用于手动发出控制信号，以实现对各种运动的控制。