yes ,i think so ,it is of vital importance to have a smile in our daily life.as you see,some people who smiles often can leave us a good impression,we can say that he or she who smiles is a kind person we can get along well with.there is no doubt that smiling people can bring us some pleasures,stony faced people can make us disappointed.as far as i am concerned,i prefer to talk with smiling persons rather than those stony faced,they give us sunshine in our everyday life and make us happy all the time.only if we smile often,can we make a harmonious society.