postanal field

例句：

1. 1. Thepatient was diagnosed with a postanalfield infection.
   病人被诊断出患有肛门区感染。
2. 2. During surgery, the surgeon carefully removedthe postanal field tissue.
   手术中，外科医生小心地切除了肛门区组织。
3. 3. The patient's postanalfield infection required antibiotic treatment.
   患者的肛门区感染需要抗生素治疗。