假设你是某国际学校的学生李华，最近在学校里总看到有浪费饭菜的现象。请你给全校同学写一封英文信，倡议大家节约粮食。要点包括：
（1）节约粮食的原因；
（2）节约粮食的具体措施；
（3）发出号召。
参考词汇：leftovers 剩饭剩菜；cleaning plate campaign 光盘行动
注意：
（1）词数 80 左右；
（2）可以适当增加细节，以使行文连贯；
（3）开头、结尾已给出，不计入总词数。
Dear students，
____
Yours sincerely，
Li Hua

【考点】书信类；提纲作文；厉行节约．

【答案】Dear students，
Recently，some students are usually seen wasting food.I am writing to call on everyone to participate in the activity of saving food.
Saving food is of vital significance.It is not easy for farmers to produce our food，and we should cherish every grain of it.Besides，the COVID-19 is still here and we shouldn't be too optimistic about our food supply.And this is what we can do：When eating at the school，buy no more than you can have.When eating out，take your leftovers back home.
I am convinced that，with our joint efforts，the phenomenon of wasting food will disappear.
Yours sincerely，
Li Hua