On trains, we often see young people not giving up their seats to the elderly or disabled. But if you ask those young people, many of them say: in the past, they had intended to give in but <b> was rejected</b>, and from then on they lost the desire to give in. For young people, starting a conversation with a stranger is a bit nerve-wracking, and giving up your seat also requires some courage. When you say "please" and receive a thank you and a smile in return, you will want to give in next time. So, if you are given your seat, even if you think "it's not necessary", <b>I hope</b> you will just sit down and smile and say "thank you".