The unwanted e-mail problem can be solved if ______

A．the government takes action

B．a new technology is adopted

C．more people are aware of the problem

D．joint efforts are made and new technology is used

结肠癌病人的健康教育包括

A．避免高脂肪、低纤维饮食

B．定期检查

C．劳逸结合

D．3-6个月复查1次

E．出院后每1-2周扩张造口1次，持续2-3月