{"ok":true,"question":{"id":21431,"question_uuid":"4a2cd1c5-fca0-4b0e-9472-70183afffbec","job_id":3,"source_file":"人教版/七下/2026江苏七年级期末数学试卷+答案420.pdf","source_page_start":3,"source_page_end":3,"source_bbox":"[30.0, 220.71, 207.65, 327.31]","subject_code":"math","grade_level":"JUNIOR","tree_code":"KT_JUNIOR_MATH_STANDARD","question_type":"choice","canonical_json":"{\"year\": null, \"blocks\": [{\"text\": \"下列四个数中, 最小的数是( )\", \"type\": \"text\"}, {\"type\": \"math_inline\", \"latex\": \"\\\\frac{(A)−3}{(B)0}\"}, {\"type\": \"option\", \"label\": \"C\", \"blocks\": [{\"text\": \"−√2\", \"type\": \"text\"}], \"source_bbox\": [30.0, 291.42, 89.54, 304.87], \"source_page\": 3}, {\"type\": \"option\", \"label\": \"D\", \"blocks\": [{\"text\": \"−1\", \"type\": \"text\"}], \"source_bbox\": [30.0, 314.34, 81.62, 327.31], \"source_page\": 3}], \"source\": {\"bbox\": [30.0, 220.71, 207.65, 327.31], \"file\": \"人教版/七下/2026江苏七年级期末数学试卷+答案420.pdf\", \"regions\": [{\"bbox\": [30.0, 220.71, 207.65, 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