A client has been placed on levodopa to treat his Parkinson's disease. Which of the following is a common side effect of levodopa that the nurse should include in the client's teaching plan

A．Pancytopenia.

B．Peptic ulcer.

C．Orthostatic hypotension.

D．Weight loss.

诊断精神障碍最好的办法是（）

A.头颅CT

B.心理测验

C.既往病史资料

D.现症精神状况检查

E.横向的现症精神状况结合纵向的病史材料