第一篇：Fatness is one of the serious problems which have a bad effect on our health.And at present the situation in the teenagers is even worse,As to this,a discussion was carried out in our class.Some students think fatness does harm to our health,so it is necessary to be on a diet and take suitable exercise to prevent it.Those who are overweight should take measures to lose weight to be healthy.But others have a different opinion.They say losing weight will be bad for the teenagers during their growth course,as well as their studies.So there is no doubt to leave it as it is.第二篇：A healthy diet and regular exercise may help to prevent obesity(肥胖) among children.Take Li Ming for example.Li Ming used to be a healthy boy,but Li Ming used to be a healthy boy,but great changes have taken place in 2003 and 2004.The meal Li Ming ate every day included a lot of and different junk food which was bad for health.What's more,he watched TV lying on the sofa and eating snacks.As a result,his weight went up day after day,he even had difficulties in climbing the stairs.This made Li Ming so sad that he decided to get a new beginning in 2004.Instead of junk food and snacks,Li Ming ate the healthy diet and took more exercise such as football,swimming,skating and running.At fast,he became as healthy as before,healthy diet and regular exercise helped him a lot.提供兩篇參考~!