全文获取类型
收费全文 | 592757篇 |
免费 | 54527篇 |
国内免费 | 17972篇 |
专业分类
耳鼻咽喉 | 5624篇 |
儿科学 | 12806篇 |
妇产科学 | 11770篇 |
基础医学 | 46850篇 |
口腔科学 | 10678篇 |
临床医学 | 58132篇 |
内科学 | 79280篇 |
皮肤病学 | 6288篇 |
神经病学 | 21786篇 |
特种医学 | 15904篇 |
外国民族医学 | 292篇 |
外科学 | 71156篇 |
综合类 | 84728篇 |
现状与发展 | 71篇 |
一般理论 | 32篇 |
预防医学 | 48246篇 |
眼科学 | 6566篇 |
药学 | 49164篇 |
528篇 | |
中国医学 | 37923篇 |
肿瘤学 | 97432篇 |
出版年
2024年 | 1924篇 |
2023年 | 10833篇 |
2022年 | 19712篇 |
2021年 | 26382篇 |
2020年 | 24613篇 |
2019年 | 28832篇 |
2018年 | 26472篇 |
2017年 | 24034篇 |
2016年 | 22640篇 |
2015年 | 23546篇 |
2014年 | 39549篇 |
2013年 | 41297篇 |
2012年 | 34118篇 |
2011年 | 36217篇 |
2010年 | 28086篇 |
2009年 | 26926篇 |
2008年 | 26757篇 |
2007年 | 26599篇 |
2006年 | 23699篇 |
2005年 | 20004篇 |
2004年 | 16390篇 |
2003年 | 14111篇 |
2002年 | 11555篇 |
2001年 | 10432篇 |
2000年 | 8636篇 |
1999年 | 7445篇 |
1998年 | 6216篇 |
1997年 | 5703篇 |
1996年 | 4858篇 |
1995年 | 4558篇 |
1994年 | 4138篇 |
1993年 | 3354篇 |
1992年 | 3208篇 |
1991年 | 2820篇 |
1990年 | 2409篇 |
1989年 | 2110篇 |
1988年 | 1956篇 |
1987年 | 1662篇 |
1986年 | 1512篇 |
1985年 | 4383篇 |
1984年 | 5267篇 |
1983年 | 3658篇 |
1982年 | 4152篇 |
1981年 | 3843篇 |
1980年 | 3414篇 |
1979年 | 3098篇 |
1978年 | 2689篇 |
1977年 | 2018篇 |
1976年 | 2265篇 |
1975年 | 1687篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
111.
泰素蒂加顺铂治疗进展期NSCLC的临床研究 总被引:5,自引:0,他引:5
目的观察泰素蒂加顺铂方案治疗进展期非小细胞肺癌的临床疗效、毒副作用。方法收集可评价疗效的进展期非小细胞肺癌50例,以泰素蒂加顺铂方案进行化疗,泰素蒂75 mg/m2静脉滴注,第1天;顺铂25 mg/m2~30 mg/m2静脉滴注,第2天~第5天,每3周为一个周期,2~3周期后评价疗效和毒副反应并随访。结果50例患者中,总有效率为50.0 %,其中初治病例为53.1 %,复治病例为44.4 %,初复治病例间差异无显著性(P >0.05)。中位缓解期为5个月。中位生存期为9.5个月,1年生存率为61.0 %。毒副反应主要为骨髓抑制,白细胞下降达Ⅲ度、Ⅳ度者52.0 %,血小板下降达Ⅲ度、Ⅳ度者为14.0 %。血红蛋白下降不严重。其他毒副反应还有脱发、过敏反应、水钠潴留、静脉炎、末梢神经炎、口腔炎、腹泻等,但发生率均较低。结论泰素蒂加顺铂方案治疗进展期非小细胞肺癌,特别是复发病例,临床疗效比较满意,毒副反应能够耐受。辅以G蛳CSF可防治重度的骨髓抑制,有较好的临床应用价值。 相似文献
112.
目的:提高前臂预成皮瓣整复术的护理水平.方法:通过术前心理护理,供区的皮肤保护,口腔装备,术后环境准备和卧位,皮瓣观察,切口护理,饮食和口腔护理进行评价.结果:预成皮瓣正常成活,色泽红润如期修复腭部缺损.结论:良好的护理可以提高前臂预成瓣移植的成功率. 相似文献
113.
ROLF HULTCRANTZ BO ANGELIN KURT EINARSSON LEIF FRIMAN 《Journal of internal medicine》1987,221(5):503-507
ABSTRACT. Hultcrantz R, Angelin B, Einarsson K, Friman L (Departments of Internal Medicine and Roentgenology, Serafimer Hospital, and Department of Internal Medicine, Huddinge University Hospital, Karolinska Institute, Stockholm, Sweden). Spontaneous regression of Budd-Chiari syndrome (hepatic venous occlusion) in a young female. Acta Med Scand 1987; 221:503–7. A case of occlusion of the hepatic veins in an 18-year-old girl is presented. The onset was sudden with massive ascites and markedly impaired general condition. The diagnosis was based on liver biopsy and angiograms of the caval and hepatic veins as well as of the celiac artery. No predisposing factors could be found. The patient was treated conservatively with laparo-centesis and diuretics. Clear improvement was seen after two weeks, and after four weeks she had no ascites and could be discharged. All liver function tests were then normalized. After three months, all diuretics could be withdrawn, and in the following 11 years she has remained completely recovered. The case illustrates that also widespread thrombi of the hepatic veins may sometimes rapidly dissolve spontaneously, with apparent total reconstitution of hepatic function. This case is unusual since previously reported cases have had high mortality rates and, in surviving cases, operative procedures or large doses of diuretics have been required to control the ascites. 相似文献
114.
The purpose of this study is to show the spectrum of adjacent organ invasion and to make a brief review of hepatic alveolar hydatid disease (AHD), using CT and MR imaging. We retrospectively reviewed CT and MR images of three patients with various adjacent organ invasions surgically and histologically proven to be AHD. Local invasion to right kidney and adrenal, right hemidiaphragm and lung were detected in one patient, right adrenal in another patient and gall bladder, duodenum, gastric wall and pancreas invasion in the other. AHD may rarely extend to the gall bladder, stomach, duodenum, pancreas, right adrenal and kidney, diaphragm, pleura and lung. The extension of the disease outside the liver is usually encountered in patients with large, peripherally located masses in the advanced stage of the disease. 相似文献
115.
116.
OBJECTIVE: The aim of this study was to evaluate the relationship between the degree of conversion (DC) of composites and the light intensity using LED-curing units and also to determine the amount of exposure required to achieve optimal curing. METHOD: The light outputs of light-curing units and the depths of cure of composites exposed to these units were determined using the methods outlined in modified ISO standards, ISO/TS10650 and ISO 4049, respectively. The distributions of DC in composites were investigated by IR spectra of microareas obtained at various depths from the irradiated surface of thin specimens cut out from the cured composites. IR spectra were measured using a Fourier transform infrared spectrometer equipped with a microscopic unit. DC was calculated from the changes in the amount of C=C double bonds in the IR spectra. RESULTS: The light intensity at various depths through the cured composite was calculated from the attenuation coefficient of each material, obtained from the linear relationship between the depth of cure and the logarithm of the amount of exposure, which is defined as the product of the irradiance and irradiation time. There was a third or fourth order regression relationship between DC and the logarithm of total light energy at a particular depth. SIGNIFICANCE: The minimum light energy required to produce a saturated DC was about 1000 s mW/cm2. 相似文献
117.
Hui-Ju Wen Ying-Chu Lin Yung-Ling Lee Yueliang Leon Guo 《Pediatric allergy and immunology》2006,17(7):489-494
High cord blood immunoglobulin E (cbIgE) is known to be associated with increased risks of atopic diseases in childhood. The relationship between genetic polymorphisms and high cbIgE has not been well documented. A cross-sectional study was conducted to assess the association between cbIgE and genetic polymorphisms of interleukin (IL)-4 -590C/T, the beta-subunit of the high-affinity receptor for IgE (FcepsilonRI-beta) E237G, lymphotoxin (LT)-alphaNcoI alleles, and tumor necrosis factor (TNF)-alpha -308G/A. A total of 320 mother-neonate pairs were recruited from four maternity hospitals from different locations of Taiwan. Cord blood was obtained and assayed for cbIgE. Polymerase chain reaction followed by restriction fragment length polymorphism was used to assess the genotypes. Three hundred pairs of mothers and neonates were included in the final analysis. Infants with IL-4 -590 C allele were found to have higher risk of elevated cbIgE (> or =0.35 IU/ml, 24.3%) (p = 0.004). After adjusting for gender, birth order, maternal age, and history of allergic disease in maternal and paternal families, odds ratios for CC and CT genotypes were 4.41 and 3.16 (95% confidence interval 0.78-22.67, and 1.66-6.13), respectively, using TT genotype as reference. The genotypes of FcepsilonRI-beta, LT-alpha, and TNF-alpha were not associated with cbIgE before or after the adjustment. Our finding suggested a significant association of cbIgE with genetic polymorphism of IL-4 -590C/T, but not with the genotypes of FcepsilonRI-beta, LT-alpha, and TNF-alpha. 相似文献
118.
Yoshinori Igarashi Naoki Okano Ken Ito Takahiko Mimura Kazumasa Miki 《Digestive endoscopy》2007,19(Z1):S109-S114
A 69‐year‐old man was admitted to Toho University Omori Medical Center complaining of icterus. Abdominal computed tomography, magnetic resonance cholangiopancreatography and endoscopic retrograde cholangiopancreatography were suspicious of cholangioma of inferior bile duct. Peroral cholangioscopy using narrow band imaging (NBI) was performed and it was possible to diagnose the mucosal spread lesions of cholangioma. Histological findings reflected the endoscopic findings. Mucosal spread lesions of cholangiocarcinoma were successfully diagnosed using the CHF‐B260 for NBI. 相似文献
119.
Andreas Blana Stefan Denzinger Markus Lenhart Wolf F Wieland Roman Ganzer 《International journal of urology》2007,14(5):450-451
We report a case of recurrent inguinal lymphocele formation after inguinal lymphadenectomy treated by lymphographic mapping and selective ligation of the lymphatic vessels. Lymphographic mapping was performed by puncturing a lymphatic vessel at the dorsum of the foot. After isolating the vessels that drained into the lymphocele, they were clipped and divided through a small skin incision. The described technique showed an instant and complete suspension of the lymph secretion with subsequent complete healing. Lymphatic mapping and selective ligation of afferent lymphatic vessels proved to be an effective treatment of a recurrent inguinal lymphocele. 相似文献
120.