确定电子束限光筒与皮肤空气间隙的改变对输出剂量的影响,需要用到()
A. 虚源位置
B. 眼光筒剂量校正因子
C. 剂量率
D. 有效源皮距
E. PDD
女性,50岁病人,有反复发作性呼吸困难病史15年,高血压病史12年,1周前受凉后出现咳嗽,咳痰伴呼吸困难,经氨茶碱、舒喘灵治疗无效,因出现尿少、嗜睡当晚被送到急诊。体检:血压10.6/8kPa(80/60mmHg),脉搏136次/分,律不齐,有频发期前收缩,跟球凹陷,口唇发绀、双肺可闻及满布的细小的哮鸣音,动脉血气:pH值7.21,PaCO29.33kPa(70mmHg),PaO26.13kPa(46mmHg),急诊医师除给予菌必治静脉注射、吸氧、地塞米松10mg,还需采取以下哪项措施()。
A. 氨茶碱0.5,静滴
B. 1‰肾上腺素0.3ml,皮下注射
C. 间羟异丙肾上腺素0.5mg,肌注
D. 654-210mg,静滴
E. 静脉补液每日不少于2000ml
You are creating a Windows Forms Application by using the .NET Framework 3.5.You plan to design a new control that will be used on multiple forms in the app.You need to ensure that the control meets the following requirement (1)It retrieves data from a MSSQL Server 2008 database instance. (2)It uses WPF classes to display data. (3)It uses user-customizable actions when the control is first painted on the form. What should you do?()
A. Create a new custom class for the control that is derived from the Control class.
B. Create a new custom class for the control that is derived from the UserControl class.
Create a new custom class for the control that is derived from the ContentControl class.
D. Create a new custom class for the control that is derived from the ContentPresenter class.
患者女,58岁,因劳力性气促、腹胀、双下肢水肿3年,加重7d伴黒蒙1次入院。8年前因病态窦房结综合征行永久人工心脏起搏器置入治疗(VVI起搏器),当时UCG和胸部X线检查均无异常。无慢性咳嗽和原发性高血压史。查体:Bp120/70mmHg,颈静脉怒张,双肺呼吸音粗,无啰音。心率50次/min,律齐,P2不亢进,胸骨左下缘可闻及4/6级全收缩期杂音,吸气时增强。肝大,双下肢水肿。最佳治疗方案为(提示食管超声发现三尖瓣间隔瓣穿孔,电极与瓣叶黏附牵连。)()
A. 利尿,纠正右心衰竭
B. 使用降低肺动脉高压的药物
C. 更换起搏器
D. 外科手术三尖瓣修复或置换
E. 心外膜永久起搏
F. 拔出原心内膜电极
G. 经皮三尖瓣置换
H. 华法林抗凝治疗