患者男，30岁，因“颈椎病”拟全身麻醉下行颈后径路手术。平素活动量可。查体：身高165cm，体重115kg，BP150/100mmHg，HR96次/min，双肺呼吸音清，双下肢不肿。

该患者选用气管内全身麻醉，气道梗阻最危险的时期是（）。

A.平卧位时

B.麻醉诱导

C.气管内插管后

D.摆放手术体位后

E.拔管后

Tom played computer games day and night. His mother really___________ his lessons.    [ ]

A. helped with    

B. worried about    

C. took pride in    

D. paid attention to