文明礼貌从我做起，从现在开始，从点滴小事做起。请根据下面的提示和要求，以 “When to Say Thank You”为题，写一篇短文。
提示：1) When should we say "thank you" at home?
2) When are we supposed to say "thank you" at school?
3) ...
要求：1) 短文须包括提示中的两个要点和一个补充要点，可适当发挥。
2) 短文中不要出现真实的地名、校名和人名。
3) 词数80个左右。(开头已给出，不计入总词数)
参考词汇：wash, encourage, open
When to Say Thank You
It's polite to say "thank you" when others help us or say something kind to us. Being polite is a good tradition in our country.Nobody likes a person who is impolite. It's important for us to be polite. We should say "thank you" to parents when they cook for us. We should say "thank you" when they wash clothes for us. We should also be polite at school. When the teachers help us work out questions ,we should say "thank you" to them. When we get bad grades and the teachers and classmates encourage us, we should say "thank you". When someone opens the door for us,we should say "thank you". We should say "thank you" as often as possible.If everyone is polite to others,the world will be more and more beautiful.
，我们将会及时处理。
