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.

下列哪项为清燥救肺汤和桑杏汤均具有的功效（）

A.清宣温燥，养阴润肺

B.清宣温燥，润肺止咳

C.清燥润肺，养阴益气

D.清宣凉燥，理肺化痰

E.清宣温燥，化痰止咳