随地吐痰是旧社会长期遺留下来的一种不良的習慣。解放以来,在全国大中城市中随着爱国衛生运动的深入开展,也进行了关于“劝止随地吐痰”的宣传教育。几年来,城市居民随地吐痰的習慣,虽然有所改善。但是有許多人还没有很好地認識到随地吐痰的害处。因此,要纠正人們随地吐痰的不良的習慣,首先就应当使人們了解“痰”所带給人們的严重危害。痰是从人的呼吸道里产生的。呼吸道包括鼻、喉、气管、支气管、肺脏等。人呼吸的时候,空气便进入了呼吸道。一般情况下健康人的痰不会太多,即便偶尔因空气里的灰尘过多,呼吸器官受到灰塵和灰塵里細菌的刺激,也可能产生痰,但是很少。如果一个人經常吐痰,就說明他的鼻、喉、气管、肺等呼吸器官的某一部份有了毛病。很多呼吸道的疾病,都是由于病菌、病毒等引 Spitting is a bad habit that has long been left behind by the old society. Since the liberation, in the large and medium-sized cities of the country, with the in-depth development of the patriotic health movement, publicity and education on “dissuading spitting” have also been carried out. In the past few years, the habit of spitting among urban residents has improved. However, many people do not recognize the harmful effects of spitting. Therefore, to correct people’s bad spitting habits, first of all, we should make people understand the serious harm that people are causing. Sputum is produced from the human respiratory tract. The respiratory tract includes the nose, throat, trachea, bronchus, lungs, etc. When people breathe, the air enters the respiratory tract. Generally speaking, healthy people will not have too many moles. Even if there are occasional excessive dust in the air, the respiratory organs may be stimulated by bacteria in the dust and dust, but it may also cause paralysis, but it is rare. If a person often spits, it means that there is something wrong with his nose, throat, trachea, lungs and other parts of the respiratory organs. Many diseases of the respiratory tract are caused by pathogens, viruses, etc.