A 70-year-old man presented to the emergency department with a 3-month history of diarrhea, without blood or mucus. He also noted nausea, nonbloody emesis, and weight loss.

中文翻译：

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一名70岁的男子出现在急诊科，有3个月的腹泻史，没有血液或粘液。他还指出恶心，无血性呕吐和体重减轻。