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【单选题】
进行静脉注射操作时,不妥的操作方法是
A.
右手持注射器，针头斜面向上
B.
在穿刺点上方约6cm处扎紧止血带
C.
注射毕，用力按压刺点，同时拔针
D.
针头与皮肤成20角，由静脉侧方刺入
E.
见回血，松开止血带，嘱病人松拳，注射
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