抗高血压药物中，保钾利尿药的主要不良反应为（）。

A.血钾减低、血钠减低、血尿酸升高

B.房屋传导阻滞，心功能抑制

C.血钾增高

D.直立性低血压

E.踝部水肿、头痛、潮红

Which of the following would the nurse teach the mother of a child with leukemia who has an absolute neutrophil count of 900/mm³

A．The child should wear gloves when in contact with others.

B．The child should stay away from crowds of people.

C．The child should eat raw fruits and vegetables.

D．Anyone in direct contact with the child must wear a gown and mask.