请根据下面提示，写一篇短文。词数不少于50。

You are discussing the following picture with your classmates. Now you are telling them how you understand the picture and what makes you think so.

提示词：电动扶梯 escalator

根据《旅行社管理条例》规定，旅行社是指有______目的，从事______的企业。