——David, could you tell me _________?——Every four years.
①应重视对儿童消费特点和心理的研究
②应重视培养儿童勤俭节约的消费观念
③应引导儿童的消费观念,倡导适度消费
④应制作儿童能够接受的产品创意广告
——________ you tell me how to write it in English?——I'm sorry, I can't.