假定已经在菜单编辑器中建立了窗体的弹出式菜单，其顶级菜单的名称为a1，其“可见”属性为False，则程序运行后，可以同时响应鼠标左键单击和右键单击的事件过程是 ______ 。

A．Private Sub Form_ MouseDown (Button As Integer, _ Shift As Integer, X As Single, Y As Singl If Button = 1 And Button = 2 ThenPopupMenu al End If End Sub

B．Private Sub Form_ MouseDown (Button As Integer, _ Shift As Integer, X As Single, Y As SinglPopupMenu a1 End Sub

C．Private Sub Form_ MouseDown (Button As Integer, _ Shift As Integer, X As Single, Y As SinglIf Button = 1 Then PopupMenu a 1End If End Sub

D．Private Sub Form_ MouseDown(Button As Integer, _ Shift As Integer, X As Single, Y As SinglIf Button = 2 Then PopupMenu a 1End If End Sub

患者，女，50岁。每年持续咳嗽约5个月，已连续10年，胸部X片示：两肺纹理增粗、紊乱。近日来咳嗽加剧，气促，痰多色黄黏稠，面红咽干，渴喜冷饮，便秘，尿赤，舌苔黄腻，脉滑数。应首先考虑的诊断是（）。

A.急性支气管炎风寒犯肺证

B.慢性支气管炎寒饮伏肺证

C.慢性支气管炎痰热郁肺证

D.急性支气管炎痰湿阻肺证

E.急性支气管炎风热犯肺证