全文获取类型
收费全文 | 174976篇 |
免费 | 11102篇 |
国内免费 | 1326篇 |
专业分类
耳鼻咽喉 | 2538篇 |
儿科学 | 3221篇 |
妇产科学 | 3913篇 |
基础医学 | 26392篇 |
口腔科学 | 3719篇 |
临床医学 | 16314篇 |
内科学 | 33143篇 |
皮肤病学 | 4777篇 |
神经病学 | 13131篇 |
特种医学 | 8895篇 |
外科学 | 23624篇 |
综合类 | 2240篇 |
现状与发展 | 5篇 |
一般理论 | 84篇 |
预防医学 | 10418篇 |
眼科学 | 4638篇 |
药学 | 14898篇 |
中国医学 | 1717篇 |
肿瘤学 | 13737篇 |
出版年
2023年 | 1078篇 |
2022年 | 2992篇 |
2021年 | 5252篇 |
2020年 | 2700篇 |
2019年 | 3904篇 |
2018年 | 4763篇 |
2017年 | 3530篇 |
2016年 | 4562篇 |
2015年 | 6171篇 |
2014年 | 7583篇 |
2013年 | 9127篇 |
2012年 | 13747篇 |
2011年 | 13376篇 |
2010年 | 7866篇 |
2009年 | 6643篇 |
2008年 | 10039篇 |
2007年 | 9843篇 |
2006年 | 9040篇 |
2005年 | 8553篇 |
2004年 | 7621篇 |
2003年 | 6621篇 |
2002年 | 5781篇 |
2001年 | 4730篇 |
2000年 | 4327篇 |
1999年 | 3523篇 |
1998年 | 1422篇 |
1997年 | 1072篇 |
1996年 | 1012篇 |
1995年 | 925篇 |
1994年 | 793篇 |
1993年 | 677篇 |
1992年 | 1682篇 |
1991年 | 1697篇 |
1990年 | 1455篇 |
1989年 | 1337篇 |
1988年 | 1239篇 |
1987年 | 1125篇 |
1986年 | 1100篇 |
1985年 | 964篇 |
1984年 | 703篇 |
1983年 | 618篇 |
1982年 | 437篇 |
1981年 | 412篇 |
1980年 | 367篇 |
1979年 | 567篇 |
1978年 | 453篇 |
1977年 | 430篇 |
1976年 | 373篇 |
1974年 | 388篇 |
1973年 | 361篇 |
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
141.
Reversible electroencephalogram changes associated with administration of baclofen in a quadriplegic patient: case report 总被引:2,自引:0,他引:2
We present the case of a spastic quadriplegic who developed mental symptoms which resolved when his Baclofen was discontinued. Of interest was the presence of EEG abnormalities similar to those described in cats receiving this drug. These abnormalities, previously unreported in humans, resolved upon discontinuing Baclofen therapy. 相似文献
142.
143.
We report a case of an abdominal mass that had hemorrhaged spontaneously into the retroperitoneal space and presented as an acute abdominal catastrophe. The pathological diagnosis was pheochromocytoma, although the patient had no suggestive symptoms preoperatively. The management of this silent pheochromocytoma and its atypical presentation are discussed. 相似文献
144.
C W Pinson R R Lopez K G Benner E B Keeffe M K Porayko A W Sasaki D K Bowers L J Wheeler R G Lee R S Johnson 《American journal of surgery》1991,161(5):606-611
During the first 24 months of the Oregon Liver Transplantation Program, which began in October 1988, 94 patients were formally evaluated and 47 adults underwent 54 liver transplantations. Thirty-four percent of patients were veterans. The recipient operation lasted a mean of 7.4 hours (range: 4 to 16 hours). Veno-venous bypass was used routinely at first but selectively later (7 of the last 26 cases), resulting in reduced operating time. Hepatic artery reconstruction was end-to-end anastomosis in 52 cases and iliac conduit in 2. No arterial thrombosis occurred. Biliary reconstruction was choledochocholedochostomy in 83% and choledochojejunostomy in 17%. Biliary complications occurred in 28%. Operative mortality was 2%, and 1-year actual survival was 80%. Patients with hepatitis B fared worse, with four of six dying at a mean of 7.6 months. Overall, the median hospital stay was 30 days. Patients surviving more than 3 months had a mean Karnofsky score of 82%. No significant difference in outcome was noted in patients receiving prophylactic OKT3 monoclonal antibody (used in 45%) versus conventional immunosuppressive therapy. Overall, allograft rejection occurred in 55% of patients. Retransplantation was required in seven patients, three for primary graft nonfunction, two for uncontrolled rejection during induction therapy with OKT3, and two for graft failure secondary to recurrent hepatitis B. 相似文献
145.
H. Iwata A. Matsuyama N. Okumura S. Yoshida Y. Lee K. Imaizumi S. Shiosaka 《Brain research》1991,550(2):329-332
We examined the localization of basic fibroblast growth factor (basic FGF) in the adult rat brain by immunohistochemical and Western blotting analysis using a specific antibody against a synthetic basic FGF fragment (N-terminal 12 residues). The antibody did not cross-react with acidic FGF. Basic FGF-like immunoreactivity was located exclusively in the neuronal elements and had very heterogenous distribution. Immunoreactive cell bodies were observed in the paraventricular, supraoptic and circular nuclei of the hypothalamus. Numerous immunoreactive neuronal processes originating from these basic FGF-positive cells extended lateroventrally and then caudally to the internal layer of the median eminence. In addition, the neurohypophysis contained a significant number of basic FGF-like immunoreactive fibers. Western-blotting analysis revealed that the hypothalamus and the hypophysis contained a main band of basic FGF immunoreactive with an apparent molecular weight of 17 kDa. These results show that the hypothalamo-hypophyseal neuroendocrine pathway contains basic FGF. 相似文献
146.
147.
This research applied the life table technique to nursing personnel data in two types of hospitals to illustrate how administrators can examine patterns of continued employment. Although a large proportion of nurses were short-stay employees, the teaching hospital was found to have a higher retention rate than the community hospital corporation. The retention patterns are examined by personal and professional characteristics, as well as by reason for termination. Implications of our findings are discussed with respect to policy concerns related to hiring, retention, productivity, and staff development. 相似文献
148.
A case of multicystic peritoneal mesothelioma in a 29 year old white male is reported. This is the second reported case of cystic peritoneal mesothelioma in a male and the first case of cystic mesothelioma reported in Australia. Clinical, histopathologic and ultrastructural findings are discussed together with a review of previous cases. 相似文献
149.
A ureteral stent placed percutaneously through a nephrostomy can be readily exchanged endoscopically for a ureteral indwelling pigtail stent over a percutaneous guide wire. Percutaneous antegrade stent placement can sometimes be accomplished when retrograde placement cannot. We report 10 successful conversions to indwelling stent in 11 cases. In 1 case the percutaneous guide wire could not be retrieved endoscopically because of a bleeding tumor in the bladder. No serious difficulties or complications were encountered. The percutaneous approach offers an alternative method of providing internal urinary diversion if retrograde ureteral indwelling stent placement has failed. 相似文献
150.
Free-floating ball thrombus in left atrium: pathological features and clinical implications 总被引:1,自引:0,他引:1
A patient with a free-floating ball thrombus in the left atrium complicating mitral stenosis is described. The pathological features and clinical implications are discussed. 相似文献