新华社北京8月21日电（记者余佩璇）近日，北京市委批准同意追认在防汛抢险救灾工作中不幸牺牲的 于鸿庆为中国共产党党员，这位"95后"基层医生的动人故事逐渐被大众所知晓。 时间回到半个多月前。7月下旬，北京市遭遇极端强降雨，北部山区突发山洪。28日4时许，天还未亮， 雨势迅猛。平谷区镇罗营急救站接到北京急救中心调度任务——密云区大城子镇南沟村出现房屋倒塌， 有人员急需医疗救援。镇罗营镇社区卫生服务中心的值班医生于鸿庆接到任务后与急救车组赶忙驱车前 往。 作为急救医生，于鸿庆常是24小时全天在岗。"'有啥事儿您随时找我'这句话他经常挂在嘴边，小于就 是这样一个乐观开朗、积极向上、不怕吃苦的孩子。"在镇罗营镇社区卫生服务中心医生梁爽看来，于 鸿庆虽然年轻，但做事沉稳、有干劲。 "小于提交了入党申请书，一直用党员的标准严格要求自己、对待群众，遇到事情他总是主动请缨。"梁 爽说。 在镇罗营镇社区卫生服务中心一层值班室，记者看到了于鸿庆的手写笔记，上面还记录着村民常用的药 品、应做的检查……作为平谷区镇罗营镇上镇村村民的家庭医生，于鸿庆对辖区内村民的健康状况了如 指掌，经常风雨无阻地穿梭于山间小路。 出发后不久，车辆行驶 ...

Core Viewpoint - The article highlights the life and contributions of Sun Siming, a 96-year-old veteran of the Eighth Route Army, emphasizing his experiences during the Second Sino-Japanese War and his dedication to medical service in the military [1][12]. Group 1: Early Life and Military Involvement - Sun Siming was born in November 1929 in a poor farming family in Shandong, and his education was interrupted by the war [1]. - Witnessing the atrocities committed by the Japanese army motivated him to join the military as a soldier in the Eighth Route Army [2]. Group 2: Medical Role and Challenges - Initially serving as a caregiver for wounded soldiers, Sun Siming's responsibilities included secretly transferring and treating injured personnel during Japanese military offensives [5][6]. - The medical supplies were severely limited, and he had to improvise with available resources, often facing life-threatening situations due to the lack of proper medical equipment [7][9][10]. Group 3: Post-War Contributions and Legacy - After the war, Sun Siming continued to serve in various military campaigns, gaining experience in medical care and eventually becoming a skilled military doctor [11][12]. - He dedicated his life to improving medical practices and educating younger generations, emphasizing the importance of remembering history and contributing to society [14].