d deliberately. For\rone thing, schools and parents cannot their obligation to guide youngsters\rto be affirmative. For another, the public media should the importance\rof optimism. Only with positive attitude towards life, can our promising future be\rwell-guaranteed.\r羡慕\rA ccording to A ristotle, happiness refers to self-contentment.\rIf one always envies others and is not content with his present situation,\rhe may never approach happiness.\rBeing envious or even jealous to peers, one may easily suffer from depression\rand frustration, which has negative impact on his physical and mental health.\rA iming to be in other' s post, one cannot concentrate on his own career and\rcan scarcely find a suitable direction for himself. Therefore, he possesses less\rchance to be a high achiever.