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眼外伤是儿童后天性盲的常见原因。儿童正处于视觉发育关键时期，一旦发生眼外伤，若治疗不及时，可导致视力终身残疾，给家庭和社会带来一......

Objective:Leukemia is the most common pediatric malignancy and a major cause of morbidity and mortality in children.Amon......