参考答案：

Dear staff,

I am writing to show my sincere gratitude for all of you. Now that I am home and on my own again, I feel extremely happy. During the time I lived at the Rehabilitation Center and was under your tender care, I promised myself I would write a letter of thanks as soon as I was able.

Abundant thanks to each one of you for your patience, expertise and genuine concern. It was you who helped me believe in myself and gave me assurance that I could walk again. I would never forget each word you said to me and the things you have done to me.

Never stop your beautiful way of working with people. Your help really means a lot to me and anyone who in trouble as well.

Affectionately,

Li Ming