Kidney;
Disease;
Center,;
the;
First;
Affiliated;
Hospital,;
College;
of;
Medicine,;
Zhejiang;
University,;
Hangzhou;
310003,;
Zhejiang;
Province,;
China;
Department;
of;
Gastroenterological;
Surgery,;
the;
First;
Affiliated;
Hospital,;
College;
of;
Medicine,;
Zhejiang;
University,;
Hangzhou;
310003,;
Zhejiang;
Province,;
China;
空肠; 旅游; 紧急情况; 十二指肠; 异物; 并发症; 吞食;