We all want to grow up happily and healthily,but,there comes a problem——how can we make it?On my opinion,a positive attitude is necessary because no matter what difficulty you meet you will get through that with confidence which comes along the positive attitude.And it is just about psychological aspect,there is also existing other important conditions——working hard and physical training.Working hard can bring us abandunt knowledge that makes us keep studying and understanding the whole world.Enough physical training.is good for us to get a strong body to deal with various situations.So as I think only when we have a strong body and get rich knoeledge with the opsitive attitude,will we really grow up happily and healthily!