The discussion of public affairs in modern society has become a normal state. Unlike ordinary "public intellectuals" and the media, the participation of think tanks in public affairs should be based on scientific analysis and demonstration, rather than emotional venting and value judgment disputes. Think tanks should try their best to start with the materials and objective facts they have obtained, complete the screening and judgment of complex data, and establish a persistent predictive analysis system. What does the author mainly want to express through this text? ['Think tank is a professional institution involved in public affairs management.', 'The operation of think tanks has quite high requirements.', 'Think tanks should participate scientifically and objectively in the discussion of public affairs.', 'Think tanks explore public affairs more deeply than ordinary "public intellectuals" and the media.']