02 / CONNECT THE MECHANISM把病机串起来
Colonic mucosal invasion → inflammation and ulceration → tenesmus and bloody stool.
英文题干线索
A traveller has fever, abdominal cramps, tenesmus and frequent small-volume bloody stools.
重点英文 · Key English
tenesmus 里急后重；bloody diarrhea 血性腹泻；fecal-oral transmission 粪口传播