【单选题】【消耗次数：1】
对偶发的室性期前收缩的病人，进行术前准备，应给予（ ）
①
西地兰0.4mg加入25％葡萄糖溶液20ml，静脉缓推
②
心得宁15mg，每日3次口服
③
阿托品0.5mg术前皮下注射?
④
地高辛0.25mg，每日1～2次口服
⑤
一般不需特殊处理
参考答案：
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