According to the recent research, heavy ...

According to the recent research, heavy coffee drinking and heart attack is not necessarily and effect

A．reason

B．impact

C．fact

D．cause

D 【解析】句意：最近一项研究证明，过量饮用咖啡与心脏病并没有必然的因果关系。本题考查短语用法。cause and effect为固定短语，意为“因果关系”。reason原因；influence影响；fact事实，都不符合题意。

考点分析：

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