童心姐姐:你好!我有一个烦恼,我以前学习成绩好,年年排在班里的前几名。可是,上学期期末我的学习成绩明显下降。妈妈说,是我和学习不好的同学在一起玩的原因。我知道成绩下降可能和我上学期太贪玩有关,但妈妈怎么能说和学习不好的同学玩成绩就会下降呢?我和朋友们很谈得来,我不想和他们反脸。我该怎么办呢?皓皓 Tongxin Sister: Hello! I have an annoyance. I used to have good grades and ranked first in the class year after year. However, my academic performance at the end of the last semester decreased significantly. My mother said that is why I play with classmates who are not well-educated. I know that the drop in grades may be related to my last semester being too fun, but how can mothers say that playing with poorly-learned classmates will decline? My friends and I have talked about it. I don’t want to look back at them. What should I do?