Many things in life disappear with the waves like duckweed, and some are firmly rooted in people's hearts like roots. Whenever I open the commemorative album and see a green leaf on the card, I deeply miss my first teacher, Miss Ye. I spent my childhood in a small mountain village that haunted me. Teacher Ye was the best guide in my childhood. Mr. Ye was only in his twenties. He is usually quiet and taciturn, but he likes talking to me very much. Teacher Ye likes me, and I respect Teacher Ye. Teacher Ye likes green leaves, and bookmarks made of green leaves can often be seen in her books. Once I was walking in the wild with Teacher Ye, and I saw her bow her head and pick up a wide leaf. "Teacher Ye, why do you like green leaves so much?" I can't help asking Teacher Ye did not deny it, but told me a very touching story: a little girl was seriously ill and thought she was dying. She looked at the ivy outside the window and said, "When the last leaf on the ivy falls, I will leave this world." People feel sorry for her. This matter was known by an old and sick painter. On a stormy night, the old painter drew a shiny green leaf to take care of his illness and tied it firmly on the ivy. Shortly thereafter, the old painter died peacefully, but the little girl survived strongly from then on. After listening to teacher Ye's explanation, I realized the real reason why she likes green leaves. Later, I left my hometown and went to Tianjin. When we parted, Teacher Ye gave me a bunch of flowers. I said, "You'd better give me a green leaf." Teacher Ye smiled knowingly, so sweet. Last Teacher's Day, I went to see Teacher Ye. She looks a little old, but she is more talkative than before. She was so happy to see me that I really couldn't bear to leave her. When she left, she gave me a very delicate card with a green leaf inlaid on it. A famous saying was neatly copied under the green leaves: the cause of flowers is (), and the cause of fruit is (). Let's do the cause of leaves, because the cause of leaves is (). Since then, I have cherished this card as much as I cherish Teacher Ye.