一般来说咳嗽只是一种保护性动作,它是在通过清除气管、支气管内部的“脏东西”来保护孩子的呼吸道。所以,应该把咳嗽看作一种信号或提示。它告诉我们:孩子的呼吸道内有“脏东西”了。从来源上讲,这些“脏东西”大致分2类:孩子呼吸道内自己产生的,来自呼吸道外的。呼吸道自己产生的“脏东西”这也就是痰。正常的呼吸道黏膜表面本身是有一层黏液的,它的作用在 Cough in general is just a protective action, it is in the trachea, bronchial internal “dirty things” to protect the child’s respiratory tract. So, cough should be seen as a signal or tip. It tells us that there is “dirty stuff” in the child’s respiratory tract. From the source, these “dirty things ” broadly divided into two categories: the child’s own respiratory tract, from the outside of the respiratory tract. Respiratory tract itself produces “dirty things ” This is sputum. The normal respiratory mucosal surface itself is a layer of mucus, its role in the