Outside the window, the autumn sunshine spilled into the laboratory, and the noise of the machines outside made the air turbid. I turned to this answer when I was sitting next to the instrument to have a rest. My thoughts can't help but go back to my childhood. As if a warm palm touched my head, that smiling face blurred. My first teacher, are you all right now?

That was in 2003. I was seven years old and in grade one.

The class is the last, and he is notoriously stupid. The word "Rui" in his name is often written backwards, even the word "2" is written backwards. Parents are helpless, no matter how to educate them, my cousin who grew up ten days older than me is very smart, often hundreds of times smarter. His brother and sister are inseparable, occupying the first position in the class.

I really work hard, but the words are still written like flies' legs, and the math is still single digits. No matter how absorbed I am in listening, learning and remembering, it seems to be in a wooden brain, which is completely useless and the teacher completely gives up.

Since the seventh grade, a new teacher has come. She is the daughter-in-law married by a relative in our village. Her surname is Guo. We call her Miss Xiaoguo. For seventeen years, I have long forgotten what she looks like. I only remember that she loves to laugh and is very gentle. She never beats or scolds her students. She is very responsible. I, the tail of a crane, successfully became her first transformation object. I stare at class, grab after class, and stay after school. She taught me almost everything except eating and sleeping. Fortunately, I was stupid and not lazy at that time, and I didn't complain no matter how late I studied at night.

She lived in the school dormitory at that time. Every afternoon after school, she moved a high chair and a low stool, put me outside in the shade, and taught me calligraphy and math one by one. My cousin sits by and watches ants. Summer is very long, and you can't see it completely until 8: 30 in the afternoon. We went home after work. If my cousin is not here, she will put me in the back seat of the bike and drive me home until I walk to the door and smell it.

One day, I remember my cousin brought a big pear and showed it to the teacher when he was practicing calligraphy after school. Teacher Xiao Guo smiled and shook his head and said, eat, the teacher is going home for dinner. The child is greedy for you again, and I ate all the pears in one bite. Sitting next to her, she couldn't help laughing, touched my cousin's head and said to finish eating. How many years have passed, and I can't forget this scene until now. She is as warm as a big sister. She gave me little encouragement when I was a child and put all her patience on me. Every word, every look is full of love for a student, which is fair and selfless.

I, a stupid bird, finally got better grades under her constant teaching. Although I was ugly in the third grade, I can't write backwards. Mathematics is also a single digit. In my little heart, I have regarded her as a childhood goddess and secretly made up my mind to repay her in the future.

Another night after school, my cousin and I sat under the pine tree to enjoy the cool and watch the ants. A man came by on a motorcycle and called Mr. Guo. Mr. Guo replied, looking back at us, touching our heads and saying that the teacher had left. We were a little surprised. Q, did the teacher leave so early? The older female teacher next to me said that Mr. Guo was going to be transferred to the city ... After listening to this, I was stunned and couldn't accept it for a while. Before I spoke, Mr. Guo got on the motorcycle and waved back. The figure was getting farther and farther away, so far that I could no longer see it. . .

Later, when I was a teenager, my pet dog died suddenly after eight years. I realized that for me, some parting seems like a cocoon, pulling away bit by bit and hurting bit by bit. When I came to my senses, I found that it had been a long time. I forgot how old I was when she left, about eight or nine years old. She didn't stay long, but I never forgot her. I used to sit under a pine tree after school until the sun went down, and then I walked home alone on a country road. I like watching the elongated figure in the sunset most, which gives me a romantic loneliness. Until now, I like to walk alone at dusk, which may be a habit formed at that stage.

In the third grade, I transferred to a school in the city, fearing that I could not keep up with the first grade. Since then, my grades have been top-notch, and the schools in the forefront of that city are highly valued by teachers. Chinese teachers often say, Oh, if only your handwriting were better. I just smiled and said, you don't know what my first-grade words look like. Although the awards in primary school were plastered all over the wall and the teachers praised them in turn, I still felt empty and lonely, and I couldn't say how sad I was. Because I didn't say goodbye to Miss Guo, didn't leave her contact information and didn't say thank you to her, maybe I'll never see her again. . .

When I graduated from the sixth grade, I went shopping near my hometown school. Suddenly I saw a familiar figure. My mother pointed at me and said, look at your teacher Xiao Guo. I don't know what emotions appeared in my mind at that moment. I dare not go forward. I hung my head timidly. Here she comes. My familiar palm touched my head and smiled and said, Oh, it's so high. My mother smiled, too. The child misses you, and your unforgettable teacher is written in the composition. She smiled gently and said that she had left suddenly, without saying anything in advance. I looked up at her and smiled shyly, but she didn't say thank you after all. When I was a teenager who neglected to express my feelings, in this way, my regret lasted forever.