患者男,25岁。一周前肛门周围持续性跳痛,皮肤红肿,并有局部压痛及波动感,诊断为肛门周围脓肿。性手术治疗,并应用抗生素,选择抗生素的方法,正确的是
D
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Asthepressure____,theliquidrockisforcedupthroughchannelsintheresistantrocktotheearth’ssurface.
Marytiptoedoverandtooktheclockawaybecauseshehatedtohearit___whenshewastryingtogotosleep.
Priceshaverecentlyriseninorderto__________theincreasedcostofrawmaterials.
You____thatlettertoJames.However,youdidn't.