全文获取类型
收费全文 | 2689124篇 |
免费 | 192791篇 |
国内免费 | 7825篇 |
专业分类
耳鼻咽喉 | 36202篇 |
儿科学 | 89379篇 |
妇产科学 | 74528篇 |
基础医学 | 378453篇 |
口腔科学 | 73135篇 |
临床医学 | 242396篇 |
内科学 | 533737篇 |
皮肤病学 | 65377篇 |
神经病学 | 222674篇 |
特种医学 | 105374篇 |
外国民族医学 | 752篇 |
外科学 | 403180篇 |
综合类 | 51224篇 |
现状与发展 | 5篇 |
一般理论 | 989篇 |
预防医学 | 201539篇 |
眼科学 | 59891篇 |
药学 | 195543篇 |
8篇 | |
中国医学 | 5587篇 |
肿瘤学 | 149767篇 |
出版年
2021年 | 20811篇 |
2019年 | 21484篇 |
2018年 | 31195篇 |
2017年 | 24144篇 |
2016年 | 28342篇 |
2015年 | 31823篇 |
2014年 | 42821篇 |
2013年 | 63899篇 |
2012年 | 85583篇 |
2011年 | 89662篇 |
2010年 | 54005篇 |
2009年 | 51501篇 |
2008年 | 84003篇 |
2007年 | 89475篇 |
2006年 | 91235篇 |
2005年 | 87734篇 |
2004年 | 84314篇 |
2003年 | 81561篇 |
2002年 | 78736篇 |
2001年 | 131099篇 |
2000年 | 133992篇 |
1999年 | 112893篇 |
1998年 | 32091篇 |
1997年 | 28601篇 |
1996年 | 28747篇 |
1995年 | 27833篇 |
1994年 | 25459篇 |
1993年 | 23795篇 |
1992年 | 86270篇 |
1991年 | 82694篇 |
1990年 | 79931篇 |
1989年 | 77159篇 |
1988年 | 70475篇 |
1987年 | 68937篇 |
1986年 | 64458篇 |
1985年 | 61400篇 |
1984年 | 45639篇 |
1983年 | 38532篇 |
1982年 | 22878篇 |
1981年 | 20356篇 |
1979年 | 39799篇 |
1978年 | 28043篇 |
1977年 | 23759篇 |
1976年 | 21962篇 |
1975年 | 23510篇 |
1974年 | 27502篇 |
1973年 | 26031篇 |
1972年 | 24408篇 |
1971年 | 22608篇 |
1970年 | 20756篇 |
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
991.
Bladder mucosa in urethral reconstructions 总被引:6,自引:0,他引:6
992.
993.
994.
995.
Howard Morgan M.D. 《Surgical neurology》1990,33(6):413-416
The Russian writer Dostoevsky (1821–1881) suffered from a rare form of temporal lobe epilepsy termed “ec-static epilepsy.” Dostoevsky used his epileptic experiences to create Prince Myshkin, the protagonist of The Idiot. The recent case of a patient who experienced ecstatic epilepsy as a result of a temporal lobe brain tumor is presented and compared with that of Prince Myshkin. Reading Dostoevsky can give the contemporary physician an insight into the inner life of an epileptic patient — an example of how art can directly benefit medical practice. 相似文献
996.
Preservation of the breast with a good or excellent cosmetic appearance is achievable in most patients. Careful attention to the details of surgical technique allows these procedures to be carried out easily and comfortably for the patient and the surgeon alike. 相似文献
997.
Improved graft survival for flow cytometry and antihuman globulin crossmatch-negative retransplant recipients 总被引:1,自引:0,他引:1
R H Kerman C T Van Buren R M Lewis V DeVera V Baghdahsarian K Gerolami B D Kahan 《Transplantation》1990,49(1):52-56
We compared our standard NIH (extended incubation) crossmatch (XM) with antihuman globulin (AHG) and flow cytometry XMs and correlated the results with rejection episodes and graft survivals. For 89 CsA-Pred, primary renal allograft recipients, AHG and/or FCXM results did not improve on the NIH-XM-negative (NEG) graft survival results, whether testing pretransplant or historical (Hx) sera. Similarly, there was no association of a positive (POS) AHG or FCXM with increased rejection episodes in these primary recipients. However, for retransplant (Re-Tx) recipients a neg AHG or FCXM did discriminate fewer rejections and an improved graft survival compared with the NIH-XM-neg. results. The overall one-year graft survival for the 47 Re-Tx recipients studied herein was 66% (based on a neg pre-Tx NIH-XM). Pre-Tx AHG-NEG, Re-Tx recipients displayed an improved graft survival compared with NIH-XM NEG recipients (77% vs. 66%, P less than 0.05) and with AHG-POS recipients (77% vs. 47%, P less than 0.05). Similarly, pre-Tx, FCXM-NEG, Re-Tx recipients displayed improved graft survivals compared with NIH-XM-NEG recipients (83% vs. 66%, P less than 0.05) and FCXM-POS recipients (83% vs. 48%, P less than 0.05). Re-Tx recipients displaying a POS AHG and/or FCXM experienced a significantly greater number of rejections than NEG-XM recipients (P less than 0.05, respectively). The AHG and FCXM results correlated with rejections and graft survivals whether testing pre-Tx or Hx high-PRA sera. Re-Tx recipients who were AHG-XM-NEG but FCXM-POS, experienced more rejection episodes than recipients who displayed a negative XM reactivity for both AHG and FCXM (P less than 0.02), but with no resulting differences in graft survival. HLA matching, pre-Tx blood transfusions and PRA did not impact on these crossmatch and graft survival results. Use of AHG and/or FCXMs for Re-Tx, but not primary, recipients should help to improve graft survival for these high-risk recipients. 相似文献
998.
M Gyulai 《Magyar traumatológia, orthopaedia és helyreállító sebészet》1990,33(3):234-236
Author reports on experiences with the Froimson-Oh operation for rupture of the long head of the biceps brachii. The operation is thought to be advantageous. It is stressed in connection with 2 cases that the faulty choice of the place of the keyhole and its unadequate formation may predispose to humerus fracture and therefore this stage of the operation needs special care. The patient has to be warned, beside early movement, to adequate caution. 相似文献
999.
N V Kornilov B M Rachkov V I Kulik V M Kustov 《Vestnik khirurgii imeni I. I. Grekova》1990,145(8):62-66
A retrospective analysis of results of treatment of 104 patients with fractures of long tubular bones associated with injuries of peripheral nerves has shown complex therapy to be necessary. Main components of this treatment were biogenic stimulators, vitamin B12, spasmolytic and dehydration drugs in combination with electrophoresis with potassium iodide and thermal procedures. Rapid disturbance of conductivity of nerve trunks after trauma should be followed by revision of the given segment of the extremity in order to remove hematoma and make reposition of displaced fragments of the bone, which can provide recovery of the disturbed function of the nerve. 相似文献
1000.
H M Edwards 《The Journal of nutrition》1990,120(9):1054-1061
Studies were conducted to evaluate several cholecalciferol (D3 metabolites: 1,25-dihydroxycholecalciferol [1,25-(OH)2D3], 1,24R,25-trihydroxycholecalciferol [1,24R,25-(OH)3D3], 1 alpha-hydroxy-cholecalciferol (1 alpha-OHD3), 24R,25-dihydroxycholecalciferol [24R,25-(OH)2D3], 1,25-dihydroxy-26,27 hexadeuterium cholecalciferol (1,25-(OH)2-26,27[2H]6D3) and 1,25-dihydroxy-24R-fluorocholecalciferol [1,25-(OH)2-24R-FD3] for their activity in preventing the development of tibial dyschondroplasia in broilers. The basal diet used is low in calcium, high in phosphorus and chlorine and is known to promote a high incidence of tibial dyschondroplasia. The chicks received ultraviolet radiation from fluorescent lights in addition to 1100 ICU/kg (27.5 micrograms/kg) of D3 in the basal diet. Supplementation of the diet with 10 micrograms/kg of all the metabolites except 24R,25-(OH)2D3 significantly lowered the incidence and severity of tibial dyschondroplasia and increased bone ash when compared to birds receiving the basal diet. None of the active D3 metabolites was effective when fed at 0.1 or 1.0 micrograms/kg of diet. Two active compounds tested [1,25-(OH)2D3 and 1,24R,25-(OH)3D3] at 5 micrograms/kg of diet were effective in reducing either the incidence or severity of tibial dyschondroplasia. 相似文献