Immediately after a 1-year-old client returns from a cardiac catheterization, the nurse notes that the pulse distal to the catheter insertion site is weak. The nurse should take which of the following actions

A. Remove the pressure bandage from the insertion site.
B. Perform passive exercises on the affected extremity.
C. Notify the physician of the assessment.
D. Record the data on the nursing notes and continue to evaluat

概率抽样是指（）。

A.每个个体被抽样抽中概率是已知非零的

B.每个个体被抽样抽中概率是可计算的

C.每个个体被抽样抽中概率是非零的

D.每个个体被抽样抽中概率是非零的，已知或可计算的

E.以上均不对