For years, smokers have been exhorted to take the initiative and quit: use a nicotine patch, chew nicotine gum, take a prescription medication that can help, call a help line, just say no.

• 多年来，人们总是劝告烟民，戒烟只要下定决心、行动起来就可以成功：使用尼古丁贴剂，嚼尼古丁香口胶，服用处方药，拨打求助电话，坚决拒绝香烟的诱惑。