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【多选题】
在日常实践中,我们多通过行为变异特征的观察来发现吸毒人员。以下哪些迹象可能是吸食海洛因人员的行为特征。( )A.
精神萎靡、频繁打哈欠、流眼泪、鼻涕，出汗、畏寒怕冷
B.
海洛因吸食者瞳孔缩小，畏光，所以会在不适当的场合佩戴太阳镜
C.
为了掩盖手臂腿脚上的注射针孔或疤痕，会长期穿不合时宜的长衣长裤
D.
藏有毒品及吸毒工具（如注射器、锡纸、切断的吸管、匙羹、烟斗等）
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