1. 表达谢意； 2. 个人感受； 3. 表达信心。
1.词数100左右； 2.可以适当增加细节，以使行文连贯； 3.开头语和结束语已为你写好。
参考词汇：流行病epidemic 疫情 epidemic situation 新型冠状病毒 novel corona virus
Dear Medical workers，
I am Li Hua from an international school in Fuzhou. On behalf of my school, I would like to express sincere gratitude to you all for your devotion and sacrifice in the battle against the novel corona virus.
In this epidemic, it is you who, regardless of the shortage of equipment and the potential of infection, desperately rescue those infected but struggling for life. It is also you who have shed new light on the virus with expertise to build up our confidence to defeat it. It is you who deserve all admiration and love!