为了解黄疽性质，先做下列哪项检查有意义

A．HbsAg

B．肝功能测定

C．大便找脂肪滴

D．大便隐血试验

E．血清淀粉酶

Success in life doesn't happen      . It's the result of devoting your time and energy to what you've set out

to do.   [ ]

A. by force      

B. by design    

C. by accident    

D. by choice