### Chinese: 他说，与之相比，在上一波的德尔塔疫情中，他治疗的新冠患者“呼吸困难，血氧水平低。
### English: By contrast, he said, in the last wave of the Delta outbreak, the new coronavirus patients he treated "had difficulty breathing and low blood oxygen levels.
### Errors: There is a major error at "Delta". There is a major error at "new coronavirus". There is a minor error at """. There is a minor error at "difficult".

### Improved English: He said that, in comparison, the COVID-19 patients he treated in the last round of epidemic suffered from “breathing difficulties and low blood oxygen.