〔R79〕  A lad always comes to me first,

                Though I serve all, best and worst,

                 So long as they will on me count

                 To help get down as well as mount.

〔譯註〕 一個少年總是最先跑來我這裡，

雖然我服務眾人，最好與最差的，

只要他們願意把我來倚靠，

幫忙走下來以及去攀高。

〔提問〕 If I am not a stair or escalator (自動梯), nor a lift or elevator, what am I?

〔謎底〕  l_____