A new medium access control method is proposed over the predominant Ethernet broadcast channel. Taking advantages of int......

目的 比较地佐辛和氟比洛芬酯多模式镇痛对食管癌患者术后镇痛的效果,探讨超前镇痛及术后经静脉患者自控镇痛(PCIA)用于大型手术术......