题目：
While suctioning a client's laryngectomy tube, the nurse should insert the catheter
A．about 1 to 2 inches.
B．as the client exhales.
C．until resistance is met, then withdraw it 1 to 2 cm.
D．until the client begins coughing.
答案：
参考答案：C
解析：The proper suctioning technique is to insert the suction catheter until resistance is met, withdraw the catheter 1 to 2 cm, then begin applying intermittent suction while withdrawing the catheter.
