13个月幼儿。咳嗽、发憋2天就诊，伴低热。查体：精神稍差，呼吸较促，呼吸40次/分，鼻翼翕动，两肺闻及固定细湿啰音，心率130次/分，律齐，心音有力。腹稍隆，肝肋下1.5cm,脾肋下及边。血白细胞计数10.3x109/L,淋巴细胞0.5。该患儿肺部X线的表现为

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