Expressing "in the final analysis" with 归根到底 and 归根结底
The phrase 归根到底 
is used to summarize or to conclude a previously stated idea.
It is placed at the beginning of a sentence and is followed by a comma.
is used to summarize or to conclude a previously stated idea.
It is placed at the beginning of a sentence and is followed by a comma.Examples
归根到底，你也跟她没有那么承认
After all, you haven't always been honest with her either
guī gēn dào dǐ, nǐ yě gēn tā méiyǒu nàme chéngrèn
归根到底, 这是她的责任
It's her responsibility, after all
guī gēn dào dǐ, zhè shì tā de zérèn
归根到底，臭氧消耗是一个全球性挑战
To sum up, ozone depletion is a global problem
guī gēn dào dǐ, chòuyǎng xiāohào shì yí ge quánqiúxìng tiǎozhàn
The phrase 归根结底 is used in the same way as the phrase 归根到底.
is used in the same way as the phrase 归根到底.Examples
归根结底，环境保护是每个人的责任
After all, environmental protection is everyone's responsibility
guī gēn jié dǐ, huánjìng bǎohù shì měi ge rén de zérèn