全文获取类型
收费全文 | 16658篇 |
免费 | 1170篇 |
国内免费 | 187篇 |
专业分类
耳鼻咽喉 | 333篇 |
儿科学 | 246篇 |
妇产科学 | 209篇 |
基础医学 | 3052篇 |
口腔科学 | 191篇 |
临床医学 | 1476篇 |
内科学 | 3298篇 |
皮肤病学 | 722篇 |
神经病学 | 1028篇 |
特种医学 | 1086篇 |
外科学 | 1611篇 |
综合类 | 63篇 |
现状与发展 | 1篇 |
一般理论 | 16篇 |
预防医学 | 664篇 |
眼科学 | 471篇 |
药学 | 1856篇 |
中国医学 | 269篇 |
肿瘤学 | 1423篇 |
出版年
2024年 | 12篇 |
2023年 | 109篇 |
2022年 | 431篇 |
2021年 | 579篇 |
2020年 | 332篇 |
2019年 | 440篇 |
2018年 | 525篇 |
2017年 | 433篇 |
2016年 | 681篇 |
2015年 | 942篇 |
2014年 | 1090篇 |
2013年 | 1172篇 |
2012年 | 1691篇 |
2011年 | 1520篇 |
2010年 | 1076篇 |
2009年 | 810篇 |
2008年 | 1089篇 |
2007年 | 984篇 |
2006年 | 801篇 |
2005年 | 773篇 |
2004年 | 593篇 |
2003年 | 490篇 |
2002年 | 412篇 |
2001年 | 193篇 |
2000年 | 140篇 |
1999年 | 105篇 |
1998年 | 64篇 |
1997年 | 56篇 |
1996年 | 40篇 |
1995年 | 26篇 |
1994年 | 35篇 |
1993年 | 21篇 |
1992年 | 38篇 |
1991年 | 37篇 |
1990年 | 30篇 |
1989年 | 26篇 |
1988年 | 30篇 |
1987年 | 22篇 |
1986年 | 25篇 |
1985年 | 22篇 |
1984年 | 15篇 |
1983年 | 10篇 |
1981年 | 7篇 |
1979年 | 10篇 |
1978年 | 10篇 |
1976年 | 6篇 |
1974年 | 6篇 |
1973年 | 7篇 |
1971年 | 9篇 |
1968年 | 7篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
31.
L Hendrickx R H Van Hee E Van de Kelft A Hubens 《European surgical research. Europ?ische chirurgische Forschung. Recherches chirurgicales européennes》1987,19(4):225-232
An operative technique using a mechanical stapling device has been developed to simplify proximal gastric vagotomy. A series of gastric fistula dogs underwent posterior truncal vagotomy and anterior lesser curvature stapling. The basal and pentagastrin-stimulated acid secretion was measured before surgery and 2 weeks and 3 and 9 months after surgery. During the whole period, no change in body weight was noticed. Gastric acid secretion in dogs remained low and stable during the first year after the procedure. 相似文献
32.
33.
Hyun Chul Kim Sang Woo Nam Yong Keun Cho Hey Jin Jeong Se In Kim Seong Hun Kim Chul Min An In Hee Kim Sang Wook Kim Seung Ok Lee Soo Teik Lee 《Taehan Sohwagi Hakhoe chi》2006,47(3):233-237
Although adenocarcinoma is a well known complication of chronic inflammatory bowel disease, primary gastrointestinal lymphoma occurring in Crohn's disease is rare. A 40-year-old man with 10 year-history of Crohn's disease had multiple longitudinal ulcerative lesions on descending colon in follow-up colonoscopic examination. Microscopic examination of proximal descending colon revealed peripheral T cell lymphoma and other site of the descending colon was consistent with Crohn's disease. The patient reached complete remission of malignant lymphoma after three cycles of combined chemotherapy. He has been well for 10 months with sulfasalazine maintenance therapy but was admitted to the hospital due to spontaneous bowel perforation of ascending colon. Right hemicolectomy was done, but the patient died of post-surgical recurrent mesenteric abscess and sepsis. To the best of our knowledge, this is the first case of Non-Hodgkin's lymphoma complicating Crohn's disease in Korea which was confirmed by immunohistochemical studies. 相似文献
34.
Si Chan Sung Yun Hee Chang Jong Soo Woo 《European journal of cardio-thoracic surgery》2007,31(4):742-743
We developed a technique of translocation of the pulmonary artery anterior to the ascending aorta without transection of the aorta in the repair of tetralogy of Fallot with absent pulmonary valve. Our technique includes detachment of the main pulmonary artery (MPA) from the pulmonary annulus, vertical division of the MPA, anterior translocation of the pulmonary artery with patch augmentation between the vertically divided MPA. 相似文献
35.
Bum Soon Choi Mi Jung Shin Suk Joon Shin Young Soo Kim Yeong Jin Choi Yong-Soo Kim In Sung Moon Suk Young Kim Yong Bok Koh Byung Kee Bang Chul Woo Yang 《American journal of transplantation》2005,5(6):1354-1360
We report here our 10-year experience of a biopsy performed at day 14 after transplantation in 304 patients with stable graft function. The factors that may have influenced subclinical rejection were analyzed according to histology. The incidence of subclinical rejection was 13.2%. Addition of mycophenolate mofetile (MMF) as a primary immunosuppressant significantly decreased the incidence of subclinical rejection compared with patients without such treatment (odds ratio, 0.23; p < 0.05). On the other hand, HLA-DR antigen mismatch (odds ratio, 2.39) and unrelated donor (odds ratio, 2.10) were also significantly associated with decreased subclinical rejection (p < 0.05). The incidence of acute rejection in patients with normal findings was lower than in those with borderline changes or subclinical rejection (0.23 +/- 0.05 vs. 0.48 +/- 0.07 and 0.60 +/- 0.11, respectively; p < 0.05). The graft survival rates in patients with subclinical rejection were lower than in patients with normal or borderline changes at 1 (88.4% vs. 97.9% and 99.1%; p < 0.05), 5 (77.8% vs. 96.2% and 95.9%; p < 0.05) and 10 (62.3% vs. 96.2% and 93.7%; p < 0.05) years. Thus, a protocol biopsy performed on day 14 after transplantation is useful for predicting graft survival. Triple therapy including MMF, related donor and HLA-DR antigen match are important factors for reducing subclinical rejection in living-donor renal transplantation. 相似文献
36.
Hilary Bok 《Neurotherapeutics》2007,4(3):555-559
Some neuroscientists argue that advances in neuroscience threaten to undermine our freedom. The argument here is that those
concerns are instances of a more general concern about the compatibility of freedom with causal determinism, and that denying
that our choices are fully determined under causal laws presents a different set of problems for the claim that we have free
will. An alternative account of freedom is presented, consistent with determinism in general, and with advances in neuroscience
in particular. 相似文献
37.
Ei Tae Kim Lee Hoo Kim Jung Il Lee Hee Seung Chin 《Japanese journal of ophthalmology》2009,53(6):598-602
Background
To assess the nature, incidence, and risk factors of retinopathy associated with pegylated interferon and ribavirin combination therapy in chronic hepatitis C patients. 相似文献38.
PCBs with the highest vapor pressures (fewest chlorines) in Aroclors 1016, 1242, 1254 and 1268 were enriched in the vapor phase relative to the original Aroclor during volatilization from a glass surface for up to 8 hr. PCBs with the lowest vapor pressures (most highly chlorinated) were enriched in the corresponding residue. Thus, visual matching of gas chromatograms with those of Aroclor standards may not be sufficient to identify a specific Aroclor since the past history of a sample is often unknown. The enrichment also was detected using isomeric classes, but not using total chlorine content. The perchlorination method and the Webb-McCall method using all chromatographic peaks agreed quantitatively; this was not always so for the NIOSH multiple peaks and the Webb-McCall methods. 相似文献
39.
A method for dynamic imaging in MRI is presented that enables the acquisition of a series of images with both high temporal and high spatial resolution. The technique, which is based on the projection reconstruction (PR) imaging scheme, utilizes distinct data acquisition and reconstruction strategies to achieve this simultaneous capability. First, during acquisition, data are collected in multiple undersampled passes, with the view angles interleaved in such a way that those of subsequent passes bisect the views of earlier ones. During reconstruction, these views are weighted according to a previously described k-space weighted image contrast (KWIC) technique that enables the manipulation of image contrast by selective filtering. Unlike conventional undersampled PR methods, the proposed dynamic KWIC technique does not suffer from low image SNR or image degradation due to streaking artifacts. The effectiveness of dynamic KWIC is demonstrated in both simulations and in vivo, high-resolution, contrast-enhanced imaging of breast lesions. 相似文献
40.
Yang Hee Lee Ihn Rhan Lee Won Sick Won Chung Hee Park 《Archives of pharmacal research》1988,11(3):247-249