{"id":84217,"topic":"peptides","source":"梅斯医学 MedSci","title":"Nature 新研究｜司美格鲁肽可延寿12.4%？-MedSci.cn - 梅斯医学 MedSci","url":"https://www.medsci.cn/article/show_article.do?id=50e4951419c0","url_hash":"0c378a8616d9f3d95e62dff05d4d857324c5e646","author":"","summary":"<a href=\"https://news.google.com/rss/articles/CBMibkFVX3lxTE5vWnhkMGZucUVzc3hQQ0FaSTBjeWxOZUFhMDFrUV80MEpXaDZZLUxzVldKVHVGUXdEWlppa0FFSHIzdUVIdDJ2bmRhSlMwY25weDlLQzBody1YQTJWRFd2X1ZWRURBMG1hRGc2Q2VR?oc=5\" target=\"_blank\">Nature 新研究｜司美格鲁肽可延寿12.4%？-MedSci.cn</a>&nbsp;&nbsp;<font color=\"#6f6f6f\">梅斯医学 MedSci</font>","content":null,"image_url":null,"lang":"zh","published_at":"2026-09-15T09:43:57+00:00","fetched_at":"2026-09-17T02:15:14+00:00","status":"read","starred":0,"extract_state":"failed","summary_auto":null,"cluster_id":null,"extract_retries":2,"extract_error":"trafilatura_none","contract_version":"news_item.v1","format_contract_version":"news_item_formats.v1","dedup_url":"https://www.medsci.cn/article/show_article.do?id=50e4951419c0","quality_profile":{"profile_version":"extraction_quality.v2","bucket":"low","confidence":0.2,"failure_kind":"extractor_empty","retryable":false,"retry_after_attempts":0,"reason":"Low confidence: extractor returned no usable article text.","operator_guidance":{"severity":"warning","recommended_action":"use_summary_with_caveat","next_step":"Use the available summary only with a visible quality caveat.","operator_label":"Use summary with caveat","can_retry":false,"can_use_summary":true,"diagnostics_required":true},"content_depth":{"contract_version":"content_depth.v1","category":"summary_only","label":"Summary only","has_full_text":false,"has_summary":true,"content_length":0,"summary_length":312,"usable_text_length":312,"source_field":"summary"},"legacy_collapsed":false,"signals":{"extract_state":"failed","extract_error":"trafilatura_none","extract_retries":2,"content_length":0,"summary_length":312}},"news_item":{"id":84217,"canonical_url":"https://www.medsci.cn/article/show_article.do?id=50e4951419c0","source_url":"https://www.medsci.cn/article/show_article.do?id=50e4951419c0","title":"Nature 新研究｜司美格鲁肽可延寿12.4%？-MedSci.cn - 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