全文获取类型
收费全文 | 1021437篇 |
免费 | 69875篇 |
国内免费 | 2426篇 |
专业分类
耳鼻咽喉 | 14521篇 |
儿科学 | 32920篇 |
妇产科学 | 29047篇 |
基础医学 | 145084篇 |
口腔科学 | 28796篇 |
临床医学 | 85121篇 |
内科学 | 205154篇 |
皮肤病学 | 22452篇 |
神经病学 | 84153篇 |
特种医学 | 41607篇 |
外国民族医学 | 336篇 |
外科学 | 160504篇 |
综合类 | 19584篇 |
一般理论 | 288篇 |
预防医学 | 71554篇 |
眼科学 | 22848篇 |
药学 | 72359篇 |
中国医学 | 1984篇 |
肿瘤学 | 55426篇 |
出版年
2019年 | 7701篇 |
2018年 | 11747篇 |
2017年 | 9463篇 |
2016年 | 10628篇 |
2015年 | 11278篇 |
2014年 | 15183篇 |
2013年 | 24229篇 |
2012年 | 32067篇 |
2011年 | 34494篇 |
2010年 | 20660篇 |
2009年 | 18525篇 |
2008年 | 33498篇 |
2007年 | 35462篇 |
2006年 | 35320篇 |
2005年 | 34785篇 |
2004年 | 33157篇 |
2003年 | 32437篇 |
2002年 | 31846篇 |
2001年 | 45712篇 |
2000年 | 48091篇 |
1999年 | 39359篇 |
1998年 | 11276篇 |
1997年 | 10202篇 |
1996年 | 9893篇 |
1995年 | 9135篇 |
1994年 | 8759篇 |
1993年 | 8239篇 |
1992年 | 28809篇 |
1991年 | 27500篇 |
1990年 | 26922篇 |
1989年 | 25868篇 |
1988年 | 23990篇 |
1987年 | 23677篇 |
1986年 | 22664篇 |
1985年 | 21756篇 |
1984年 | 16395篇 |
1983年 | 13988篇 |
1982年 | 8634篇 |
1979年 | 15014篇 |
1978年 | 10604篇 |
1977年 | 9059篇 |
1976年 | 8502篇 |
1975年 | 9316篇 |
1974年 | 11041篇 |
1973年 | 10474篇 |
1972年 | 9892篇 |
1971年 | 9163篇 |
1970年 | 8796篇 |
1969年 | 8222篇 |
1968年 | 7881篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
991.
992.
F. Forterre S. Kaiser K. Matiasek L. Brunnberg 《Transboundary and Emerging Diseases》2007,54(5):250-253
This article describes identification of a metastatic adenocarcinoma to the intertransversarius cervicis muscle using magnetic resonance imaging (MRI) in a dog that presented with chronic lameness of the right forelimb. Magnetic resonance imaging revealed a right sided, ovoid signal abnormality within the intertransversarius cervicis muscle lateral to the sixth cervical (C6) vertebra. The lesion was uniform, hyperintense on T2‐ and isointense on T1‐weighted images to muscle and exhibited uniform contrast enhancement on T1‐weighted images. The MRI findings were consistent with a neoplasia. Surgical excision was performed. Histopathological diagnosis was metastatic fibrous adenocarcinoma. The dog recovered rapidly but 6 months post‐operatively he was killed because of lung metastases. Necropsy was declined and the primary tumour could not be identified. 相似文献
993.
BACKGROUND: Necrotizing fasciitis (NF) is still a source of high morbidity and mortality. These difficult cases are increasingly referred to burn centers due to special wound and critical care issues. Here we examine our institution's recent experience with a large series of NF. METHOD: We performed a retrospective chart review of 32 consecutive patients over a 10-year period with NF who required radical surgical debridement and surface reconstruction. RESULTS: Overall survival was 85%, with average length of stay of 74.0+/-7.5 days for survivors (S) and 68.8+/-6.3 days for nonsurvivors (NS) (P>0.05). Time until first operation was 5.2 days in S and 3.4 days in NS (P<0.05). Patient age averaged 51.1+/-11.2 years for S and 57.0+/-12.0 years for NS (P<0.05). Survivors averaged 1.6 relevant comorbidities and NS averaged 3.6 (P<0.05). Affected total body surface (TBS) per patient averaged 6.8+/-3.3% for S and 10.2+/-5.1% for NS (P<0.05). All NS had affection of the trunk, and none of the patients with exclusive affection of extremities died. CONCLUSIONS: There were frequent delays in diagnosis and referrals to our institution, and progress can be made in educating the medical community to identify these patients. Not only the affected TBS and location but also comorbidities, age, and immediate surgical treatment are important prognostic factors. Referral to a specialized facility such as a burn center is urgently recommended for optimal surgical intervention, wound care, and critical care management. 相似文献
994.
995.
Choline deficiency in the baby pig 总被引:1,自引:0,他引:1
996.
997.
998.
999.
MALDONADO JF HERNANDEZ MORALES F 《The Puerto Rico journal of public health and tropical medicine》1948,24(2):121-34. Also Spanish transl., 135-49
1000.