患者男性，64岁，头晕、胸闷2天。心电图如下图所示。

与上述心电图表现容易混淆的是（）。

A.交界性期前收缩

B.一度窦房阻滞

C.二度窦房阻滞

D.干扰性房室分离

E.窦性停搏

Business is improving but much more work and common sense will be ______ before any profits can be realized .

A．put up with

B．called for

C．gone through

D．taken up