An 18-month-old child is brought to the emergency department with suspected croup. The child appears frightened and cries as the nurse approaches him. The nurse needs to assess the child’s breath sounds. The best way to approach the child is to（）

A. expose the child’s chest quickly and auscultate breath sounds as quickly and efficiently as possible.
B. ask the mother to wait briefly outside until the assessment is over.
C. tell the child the nurse is going to listen to his chest with the stethoscope.
D. allow the child to handle the stethoscope before listening to his lungs.

白血病病人，活动后突然头痛、呕吐，视物模糊、意识不清。护理措施不妥的是

A．绝对卧床
B．头部置冰帽
C．头略低保证脑供氧
D．吸氧
E．迅速建立静脉通路