患者，男，18岁，瘦长体型，高度近视，心脏超声检查示升主动脉瘤样扩张，内径为50mm，升主动脉内见一强回声光带将主动脉分为两腔，诊断为

A．主动脉瓣狭窄

B．主动脉瓣关闭不全

C．马方综合征

D．主动脉缩窄

E．以上都不是

Reviewing work products and results to ensure that all were completed satisfactorily and formally accepted is part of （）.

A．risk management

B．quality control

C．change control management

D．verify scope