1. beginning: the date and title of the letter, such as "dear beauty" or "dear good-hearted person who found the cat".
2. Express gratitude: Express your gratitude directly to her, such as "Thank you very much for finding my cat when you needed help".
3. Describe the event: briefly describe how the cat was lost and found, such as "My cat was lost at a certain time and place, but fortunately you found it, give it back to me".
4. Express the importance of cats: explain the importance of cats to you, such as "My cat is my closest partner, and it has spent many lonely moments with me".
Thanks again: Express my gratitude to her again, such as "Thanks again for your kindness and help. Your behavior has filled me with confidence in human nature. "