hù / shi / xiān / gěi / bìng / rén / chōng / yǎng / rán / hòu / zài / jiǎn / chá / tā / de / xuè / yǎng / shuǐ / píng

护士先给病人充氧，然后再检查他的血氧水平。

The nurse first gave the patient supplemental oxygen and then checked his blood oxygen level.