研究证据矩阵

把材料中的关键主张逐条整理为证据矩阵：主张、原文或数据定位、来源、日期、支持强度、反例、局限和待核实问题。只使用已提供的证据，不补造引用。区分直接支持、间接推断与没有支持。最后指出最值得补充的三项证据及其获取方法。

输入材料：
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目标与约束：
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只依据输入回答。缺少关键信息时明确标记未知，必要时先提问。输出应可直接用于当前任务。

Build a matrix of claims, evidence locations, sources, dates, support strength, counterevidence, limitations and open questions. Use only supplied evidence; never invent citations. Distinguish direct support, inference and unsupported claims. End with the three most valuable evidence gaps and how to investigate them.

Input material:
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Goal and constraints:
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Base the response on the input. Mark missing information as unknown and ask essential questions when needed. Make the output directly usable for this task.