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春天来了,百花盛开,但有些小朋友会感到身体不舒服,不是皮肤痒,就是流鼻涕。这是怎么回事? 上海江宁小学梅岭
Spring is coming and flowers bloom, but some children feel uncomfortable, not itchy skin, or runny nose. What is going on? Mei Jiang, Shanghai Jiangning Primary School