infected patch

例句：

1. 1.The doctor advised him to keep the wound clean and avoid touching it with his hands.
   医生建议他保持伤口清洁，避免用手触摸。
2. 2.The patient was diagnosed with a severe infection and required immediate treatment.
   患者被诊断出严重感染，需要立即治疗。
3. 3. The infected patch began to heal after several days of antibiotic treatment.
   经过几天的抗生素治疗后，感染区域开始愈合。