子弹上膛，切勿对人，玩弄枪支，难免走火，这种意外既往屡见不鲜。随着枪支管理工作加强，意外走火大大减少。但俗称“不怕一万，只怕万一”人们还得警惕持枪走火的意外，若子弹嵌入鼻窦内就成为“鼻窦异物”。 鼻窦为鼻腔周围颅骨和面骨内的含气空腔，共有四对，依其所在的颅 Bullets loaded, not on people, playing with firearms, it is inevitable fire, this accident was not uncommon. With the strengthening of firearms management, accidents have greatly reduced. But commonly known as “not afraid of ten thousand, I’m afraid only in case of” people have to guard against accidents with guns and fire, if the bullet embedded in the sinus become “foreign body of the sinuses.” Sinus for the nasal cavity around the skull and facial gas cavity, a total of four pairs, according to their cranial