### 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: In contrast, he said, in the last wave of the Delta outbreak, the new-crowned patients he treated "had difficulty breathing and low blood oxygen levels.<v>"</v>
### Errors: There is a minor fluency/punctuation error at """ within <v></v>.

### 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.
