1. To understand why blue light is responsible for accelerating aging in fruit flies, we compared the levels of metabolites in flies exposed to blue light for two weeks to those kept in complete darkness.

句中compare的比较对象不一致，请问这样是否正确。

2. 之前请教过类似的问题：https://www.cpsenglish.com/question/58957，这是similar比较对象不一致的问题。

更常见的是这种（than）：https://www.cpsenglish.com/question/2551

有哪位老师在这方面有研究吗？能不能作补充汇总。