为确定诊断最佳的检查方法为

A．反复查便常规

B．肿瘤标志物检测

C．腹部CT检查

D．结肠镜检查

E．血清生化学检查

If parents have children help with housework, the children will feel needed. ______, they will learn to take care of themselves.

A．On the contrary

B．In a word

C．That is to say

D．What’s more