The nurse is teaching the client how to use a cane. Which of the following statements is most inaccurate

A．The client should hold the cane on the involved side.

B．The client should hold the cane close to his body.

C．The stride length and the timing of each step should be equal.

D．The nurse should stand behind the client to prevent falls.

患者男，65岁。吸烟40余年，慢性咳嗽、咳痰20余年。近2年来劳累时有气急。查体：两肺呼吸音减弱，肺下界下移，两肺底有细小湿啰音。最可能的诊断是（）

A.大叶性肺炎

B.肺气肿

C.胸腔积液

D.支气管哮喘

E.气胸