Data shows that the distance from China to Peru is 17,049 kilometers. In addition to its literal meaning, this phrase also ...

简单说，就是食管和胃的连接处的开关（贲门下端括约肌）失灵了，吃饭时候该开口，却没有开，食物下不去，所以会吞咽苦难;强制地咽下食物就会造成食管下端变粗，可是和胃连接的地方却很细，看起来就是个鸟嘴的形状。