[解析]
We all want to qrow up happily and healthily,and for this goal we must do several things.(引题)
Firstly,we should develop a positive attitude towards life.Life consists of not only sunshine but also hard times,so we should be brave when faced with difficulties(高分句型一).Secondly,we must study hard,because knowledge is power.Only in this way can we make contributions to the country,meanwhile we can enjoy a better life(高分句型二).Thirdly,doing exercise frequently and having a healthy diet is very important for our health and growth.(健康成长的方法)
In a word,if we do these things.we will be able to grow up happily and healthily.(总结)