Multiple Restaurants Test Positive for Residual Dichlorvos; Green Tea Says It Was Unaware as Officials Investigate. Would Restaurants Be Liable for Food Poisoning, and How Can Consumers Defend Their Rights?

多家餐厅残留液体敌敌畏检测阳性，绿茶称不知情，官方调查，一旦发生食物中毒餐厅要担责吗？消费者如何维权？

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