已知D（x₀，y₀）为圆O：x²+y²=12上一点，E（x₀，0），动点P满足 $\overrightarrow{OP}$ = $\frac{1}{2}\overrightarrow{ED}$ + $\frac{\sqrt{3}}{3}\overrightarrow{OE}$ ，设动点P的轨迹为曲线C．

    I'm Sally . I was a shy girl . Bu this term , I decided to do a brave（勇敢）thing . In this term , we had a new subject to learn –physics . When our teacher asked someone to be the physics monitor（物理课代表）, I put up my hand and got the role . But it was not as easy as I thought .

    At the beginning , I found that many students did not hand in（上交）their homework , so I was a little worried . I shouted at the students . It made the students angry . One girl asked : “ Why are you shouting at me ? You're making it seem like it is all my mistake（错误）. ” Then I found that , it was my mistake in fact . I should talk to my classmates in a kind way and not get so angry .

    After this , I changed（改变）how I spoke . “ Excuse me . Could you please finish your homework ? ” I said . Later , I was surprised that many students understood me a lot better and finished their homework quickly.

    I found the best way to do this job is to talk with my classmates in a friendly way . Now , I am getting better and better with my classmates . This job makes me feel like I am growing up like a little tree day by day .