流通范围广、社会影响大的不安全食品的召回，属于（）
A、一级召回
B、二级召回
C、三级召回
参考答案：A
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.
哮病病因病机
