In a traffic separation scheme, when joining a traffic lane from the side, a vessel shall do so（）.

A.at as small an angle as possible

B.as nearly as practical at right angles to the general direction of traffic flow

C.only in case of an emergency or to engage in fishing within the zone

D.never

晨间护理的目的不包括（）。

A.使患者舒适

B.预防压疮及肺炎

C.保持病室整洁、美观

D.增进护患交流

E.消除患者疲劳