目的 探讨小儿反复呼吸道感染 ( RRI ) 与胃食管返流 ( GER ) 的关系.Objective To study the relationship between recurrent respiratory infection ( RRI ) and gastroesophageal reflux ( GER ) in children.绝大多数瓣膜返流轻微或轻度, 且只发生于一组瓣膜.Most of regurgitation...
She taught me to do the weeding.她教我除草。The more ploughing and weeding, the better the crop.一分耕耘, 一分收获.When you're weeding , you must dig up the roots.斩草必须除根....