erythema congestivum

例句：

1. 1.He was diagnosed with erythremia and required immediate treatment.
   他被诊断出患有贫血症，需要立即治疗。
2. 2. The patient's condition worsened due to the lack of oxygen in the blood.
   由于血液中缺乏氧气，患者的病情恶化了。
3. 3.Erythremia can be caused by various factors such as anemia or dehydration.
   贫血或脱水等因素都可能导致贫血症。