检测Ig和补体的含量可采用

A．双向免疫扩散
B．单向免疫扩散
C．直接凝集实验
D．间接凝集实验
E．协同凝集实验

A mother brings her 2-year-old adopted Korean child to the clinic for an initial checkup. The child has been living with the adopted family for several weeks. The nurse notes an irregular area of deep blue pigment on the child’s buttocks extending into the sacral area. What should the nurse do()

A. Ask the mother in private how the bruise occurred.

B. Notify social services of a case of possible child abuse.

C. Question the mother about the family’s discipline style.

D. Do nothing concerning this finding.