Drugs to treat acute anxiety are prescribed to a client hospitalized for an acute myocardial infarction. The client is reluctant to take anti-anxiety drugs. The nurse suspects that the client is holding the drugs under his tongue and disposing of them after she has left the room. What should the nurse do first ？（）

A．Report her suspicions to the client’s physician.

B．Talk to the client about his attitude toward the medications.

C．Search the client’s room for evidence of the medications.

D．Tell the client that his behavior must stop for his own well-being.

题77图是学生选修课程的E-R图，根据此E-R图转换得到的关系模式有（）

A．学生（学号，姓名，年龄，性别）

B．课程（课程号，课程名，学时数，学分）

C．选课（学号，课程号，成绩）

D．选课（成绩）