小题1:B
小题2:A
小题3:B
小题4:C
小题1:B 推断题。根据短文第一段中的“they could not provide effective medical care to their patients…the nursing staff is particularly important.”两句推断可知。
小题2:A 推断题。根据短文第三段中的“the nursing staff must provide nursing services on a 24-hour basis and attend to patients’ needs”一句可推断，护士只为病人提供护理服务，不处理伤病。
小题3:B 细节题。分析第三段中的“This responsibility continues around the clock, and so nurses must work in shifts”一句可知。
小题4:C 归纳题。根据短文第二段“Caring for sick persons requires a great deal of patience and concern”及最后一句“Only very dedicated people have chosen nursing as a profession”可知。