How to prevent ear infections? 如何预防耳部感染？

？ How can I keep my child's ears clean?The ear is a self-cleaning organ and does not require any active cleaning. The ear only needs to be cleaned from outside. No object or fluid should be inserted or instilled into the ears, unless prescribed by a health professional.问：我怎样才能让我孩子的耳朵保持清洁？答：耳朵是自我清洁的器官，不需要任何主动清洁。只要清洁耳朵外部就可以了。没有卫生专业人员的处方，不要把任何东西插入耳朵或注入任何液体。？  Why does my child get pain in the ear?Pain in the ear can be caused by problems such as:·         impacted cerumen (wax) in the ear;·         acute infection in the ear canal;·         acute infection of the ear drum; or·         because of fluid in the middle ear.In order to identify the problem, your child should be t ………………………………