医学会在收到医疗事故双方当事人的材料后，经书面陈述及答辩之后，出具鉴定书的期限应为（

基准制可以分为基孔制和基轴制，在一般情况下为什么要优先选用基孔制？

下列哪项不是颈椎牵引的禁忌证（）

A．类风湿病变

B．急性寰枢关节半脱位伴颈椎损伤

C．颈椎间盘突出症明显压迫脊髓

D．各种原因引起的颈肌痉挛

E．颈椎间盘炎症

A client with recurred cancer is planned to take internal radiation treatment with a radium implant. The client tells the nurse that she is concerned about being radioactive and has been having nightmares about the treatment. What would be a reasonable explanation for the nurse to give to the client()

A. "Careful shielding prevents the area above your waist from radioactivity. "

B. "These nightmares indicate that you’re in the denial phase of accepting the diagnosis. "

C. "The radioactive material is controlled and stays with the source; once the material is removed, no radioactivity will remain. "

D. "The radioactivity will gradually decrease, and you will be discharged when the radioactive material reaches its half-life. \

中医养生保健主要内容为精神保健、工作保健、起居保健、体育保健、饮食保健。（）