{"ok":true,"question":{"id":22317,"question_uuid":"7906826a-e910-4977-b665-6db7b8742e8f","job_id":3,"source_file":"人教版/七下/2026江苏七年级期末数学试卷+答案675.pdf","source_page_start":3,"source_page_end":3,"source_bbox":"[30.22, 250.78, 373.6, 277.39]","subject_code":"math","grade_level":"SENIOR","tree_code":"KT_SENIOR_MATH_STANDARD","question_type":"fill_blank","canonical_json":"{\"year\": null, \"blocks\": [{\"text\": \"如图，小晨将一片树叶放在平面直角坐标系中，已知点A(−1, 2), B(1, 1)，则叶柄底部点C的坐标为____ ．\", \"type\": \"text\"}, {\"kind\": \"embedded_image\", \"type\": \"figure\", \"width\": 520, \"height\": 394, \"sha256\": \"cbd6a18a489c9d888a7b684312c9d94ca14c9e14e54331b47810d7c01bfd4216\", \"caption\": \"\", \"asset_key\": \"math/2026/09/2b06312b-7e3f-494e-ae3e-21d10207fcf7/7906826a-e910-4977-b665-6db7b8742e8f/cbd6a18a489c.png\", \"public_url\": \"http://tikupdfpng.mtwlkj.net:5129/qbank/math/2026/09/2b06312b-7e3f-494e-ae3e-21d10207fcf7/7906826a-e910-4977-b665-6db7b8742e8f/cbd6a18a489c.png\", \"source_bbox\": 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