acute ileus的用法和樣例：
例句
- In acute bowel obstruction, patients have colicky abdominal pain with vomiting.
急性腸梗阻的病人出現腹部絞痛和嘔吐。 - In acute intestinal obstruction the first symptom is pain occurring in severe bouts of colic lasting a few minutes but becoming persistent.
患急性腸梗阻時，最初的癥狀是疼痛，表現為劇烈的陣發性絞痛，持續幾分鐘，以後變為持續性疼痛。
