尊敬的XXX先生/女士：
请允许我向您表达我最诚挚的感谢。我非常感谢您在过去的几年中对我的支持和帮助。正是由于您的慷慨和耐心，我才能够顺利地度过每一天，不断地取得进步和成功。
我一直记得您在我遇到困难时所给予的帮助和鼓励。您不仅教会了我如何克服困难，而且还教会了我如何成为一个更好的人。您的言传身教让我受益匪浅，我将永远铭记在心。
我非常感激您对我的信任和信心。您总是相信我能够做到，并鼓励我勇往直前。这种信任和支持对我来说是无价之宝，我会继续努力不辜负您的期望。
再次感谢您对我的关心和帮助。我希望您能够一直保持健康和幸福，享受美好的人生。
此致
敬礼！
XXX
英文版：
Dear [ame],
Firs ad foremos, please allow me o express my deepes graiude owards you. I am immesely graeful for he suppor ad assisace you have redered me over he years. I is your geerosiy ad paiece ha have eabled me o avigae each day ad coiue o grow ad succeed.
I will always remember he help ad ecourageme you provided me durig my difficul imes. You o oly augh me how o overcome challeges, bu also isilled values ha have made me a beer perso. Your words of wisdom have bee ivaluable, ad I will hold hem close o my hear forever.
I am graeful for your rus ad cofidece i me. You always believed i me ad pushed me o keep movig forward. Your faih ad suppor are priceless, ad I will coiue srivig o mee your expecaios.
Lasly, hak you oce agai for your关心ad assisace. I wish you coiued healh, happiess, ad a fulfillig life ahead.
Sicerely,XXX