The nurse is making a plan of care for the child with juvenile rheumatoid arthritis to reduce joint pain in the morning just after arising. Which of the following interventions would be included in the plan

A. Awakening the child once nightly to exercise the joints.
B. Having the child sleep in a sleeping bag.
C. Having the child sleep with the joints flexed.
D. Increasing pain medication at bedtim

血清中含量最少的免疫球蛋白为

A．IgG

B．IgA

C．lgM

D．IgE

E．IgD