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【多选题】
砒霜,即三氧化二坤,毒性很强,进入人体后能破坏某些细胞呼吸酶,使组织细胞不能获得氧气而死亡。人们谈到砒霜第一反应基本上都是毒药,电影、电视剧中也有大量砒霜作为致命毒药使用的场景,然而我国医生发现三氧化二坤可以治疗白血病,对急性早幼粒细胞白血病 (APL) 患者效果最好。这表明 ( )
A.
具体问题需要具体分析
B.
认识的真理性需要不断经受实践的检验
C.
熟知不等于真知，科学认识归根到底只能来源于理性认识
D.
认识是在实践基础上不断丰富发展的过程
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