Nowadays, many people walk to work ____Copenhagen Conference calling for living a low-carbon lifestyle to cope with global warming.

A．in relation to

B．in response to

C．in addition to

D．in opposition to

预防创伤感染，作清创缝合时下列错误的是

A．清除污物异物，切除失活组织，彻底止血

B．清创术应在伤后6～8小时内施行

C．头面部创伤超过24小时亦应清创

D．超过12小时有可能感染的伤口可延期缝合

E．如有橡皮片引流，72小时后取出，