我的姐姐 My Elder Sister

I have a sister, she is older than me. My sister is very nice to me, she always lets me choose the food first and then she eats the less one. My sister sees me through all the time, when I have bad mood, she will comfort me. Sometimes we will have argument, my sister will say sorry to me. Now I want to be her good little sister. 
我有一个姐妹,她比我大。我姐姐对我很好,她总是让我先选择食物,然后她吃少的那份。我姐姐总能看穿我,当我心情不好时,她会安慰我。有时我们会争论,我姐姐会跟我道歉。现在我想成为一个好妹妹。