列举个例 —— 良好饮食习惯 　　as we all know, we are what we eat. therefore, it’s important for us to form healthy eating habits. however, some students have formed a variety of bad eating habits, such as not having breakfast, loving eating snacks, being particular about food, eating and drinking too much and so on, which will surely do harm to their health. to keep healthy, we should have healthy diets. not only should we have various foods, like fish, meat, vegetables, fruits as well as rice, noodles, but also we should have the foods regularly and properly. personally, i think it is important to keep a healthy diet, which contributes to building up a strong body. only in this way can we have enough energy to study better.

举例说明 —— 和谐师生关系对你的影响 　　actually, having a good relationship with teachers makes it easier for us to get along smoothly with our study at school. take me for example. my teacher is my good friend. when i fail in the exam, it is my teacher that first helps m to analyze the problem. she is patient enough to make me get over all the difficulties in my study. when i am unhappy she always listens to me carefully and then gives me some reasonable suggestions, so that i can focus on my study soon. also, i have learned to be helpful and considerate. but for(要不是) the good relationship with my teachers, i could not have made such progress.