出自春秋末鲁国左丘明所撰《国语·周语上》，“防民之口，甚于防川，川壅而溃，伤人必多，民亦如之。是故为川者，决之使导；为民者，宣之使言。”意思是阻塞老百姓的嘴，好比阻塞河水。言外之意是不让人民说话，必有
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