男性患者,53岁,二尖瓣狭窄,当失代偿期发生时,最早出现的症状是
A. 咯血
B. 劳力性呼吸困难
C. 晕厥
D. 心绞痛
E. 腹痛
关于颅骨牵引是颈椎骨折及脱位常用的治疗措施,下列说法正确的是
A. 屈曲性骨折脱位仅需维持于屈曲位牵引
B. 屈曲性骨折脱位需立即复位,维持于过伸位牵引
C. 屈曲性骨折脱位需立即复位,先维持于过伸位牵引,再逐渐过度到中立位
D. 过伸性骨折脱位需维持于略屈曲位牵引
E. 屈曲性骨折脱位需维持于略过伸位牵引
What does the passage mainly discuss
A. The origins of theatre.
B. The role of ritual in modem dance.
C. The importance of storytelling.
D. The variety of early religious activities.
Her house is within ______ from the police station.
A. a stone's throw
B. a throw ora stone
C. stone's throw
D. the stone's throw