他的关注焦点主要是数据组的选择问题，以及研究必须分析其结果对不同选择数据组的敏感性。
His concerns centred mostly on questions about the selection of data sets and the need for studies that showed how sensitive the results were to different selections of data.
我们不再谈论事件或者其声名斐然的作者，而是关注实际的文档问题。
We are no longer talking about the event or its prestigious authors, but the actual document in question.
迫使国会偶尔关注债务问题，并且在提高债务限额之前思考其影响，这种做法或许曾经有过价值。
There may once have been value in forcing Congress to occasionally focus on the debt and think about its implications before raising the debt limit.
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