全文获取类型
收费全文 | 14928篇 |
免费 | 629篇 |
国内免费 | 593篇 |
专业分类
耳鼻咽喉 | 98篇 |
儿科学 | 205篇 |
妇产科学 | 82篇 |
基础医学 | 697篇 |
口腔科学 | 451篇 |
临床医学 | 2619篇 |
内科学 | 353篇 |
皮肤病学 | 77篇 |
神经病学 | 413篇 |
特种医学 | 2215篇 |
外国民族医学 | 1篇 |
外科学 | 5021篇 |
综合类 | 1914篇 |
现状与发展 | 1篇 |
预防医学 | 948篇 |
眼科学 | 288篇 |
药学 | 496篇 |
1篇 | |
中国医学 | 122篇 |
肿瘤学 | 148篇 |
出版年
2024年 | 16篇 |
2023年 | 174篇 |
2022年 | 306篇 |
2021年 | 430篇 |
2020年 | 410篇 |
2019年 | 358篇 |
2018年 | 367篇 |
2017年 | 303篇 |
2016年 | 322篇 |
2015年 | 333篇 |
2014年 | 741篇 |
2013年 | 1149篇 |
2012年 | 654篇 |
2011年 | 922篇 |
2010年 | 851篇 |
2009年 | 907篇 |
2008年 | 927篇 |
2007年 | 1009篇 |
2006年 | 827篇 |
2005年 | 771篇 |
2004年 | 636篇 |
2003年 | 654篇 |
2002年 | 512篇 |
2001年 | 518篇 |
2000年 | 385篇 |
1999年 | 291篇 |
1998年 | 249篇 |
1997年 | 150篇 |
1996年 | 116篇 |
1995年 | 121篇 |
1994年 | 94篇 |
1993年 | 80篇 |
1992年 | 75篇 |
1991年 | 66篇 |
1990年 | 57篇 |
1989年 | 50篇 |
1988年 | 46篇 |
1987年 | 48篇 |
1986年 | 37篇 |
1985年 | 34篇 |
1984年 | 30篇 |
1983年 | 12篇 |
1982年 | 20篇 |
1981年 | 21篇 |
1980年 | 14篇 |
1979年 | 17篇 |
1978年 | 8篇 |
1977年 | 7篇 |
1976年 | 9篇 |
1975年 | 6篇 |
排序方式: 共有10000条查询结果,搜索用时 20 毫秒
61.
目的构建+10Gz重复暴露大鼠脑差异表达基因的消减cDNA文库。方法本实验用SD大鼠,分别提取暴露组与对照组的总RNA,并分离纯化mRNA,应用抑制性消减杂交技术分离+10GI重复暴露大鼠脑差异表达基因eDNA片段并建立消减eDNA文库;利用PCR对随机挑选的75个白色菌落进行插入片段的验证,对其中70个克隆进行eDNA斑点杂交验证。结果所构建的eDNA文库扩增后包含约400个白色克隆和100个兰色克隆,随机挑选75个白色克隆入质粒载体后共获得70个阳性克隆。结论应用抑制性消减杂交技术成功构建了+10Gz重复暴露大鼠脑差异表达基因消减eDNA文库,为进一步筛选和克隆脑损伤相关基因奠定了基础。 相似文献
62.
63.
64.
电视胸腔镜技术在胸部外伤中的应用 总被引:4,自引:0,他引:4
目的 探讨电视胸腔镜手术 (VATS)治疗胸部外伤的应用价值。方法 1999年 5月~ 2 0 0 2年 10月行VATS 12例。研究手术方法 ,手术效果及并发症的预防。结果 VATS时间 35~ 180min ,平均 10 6min。手术成功 12例 ,无 1例死亡。结论 随着VATS技术和熟练程度的提高 ,并发症逐步降低。电视胸腔镜辅以小切口手术(VAMT)的应用更符合传统手术操作习惯 ,并能降低手术费用 ,适合我国国情。VATS治疗胸部外伤具有安全 ,疗效好等特点 相似文献
65.
目的 探讨早期清创、组织修复在热压伤治疗中的临床疗效。方法 分析43例不同程度手部热压伤患的病损特点并行临床分度,以便准确诊治、判断预后;全部病例采用早期手术治疗,轻度热压伤(即浅Ⅲ度烧伤)早期行切痂全厚或中厚皮片修复,中度和重度热压伤早期彻底清创保留间生态组织,应用血循环丰富的组织瓣修复创面。结果 42例创面一期修复,手功能和外形恢复满意:1例创面二期修复,手功能恢复差。结论 手部热压伤应早期手术清创,据病损程度选择良好的方法及时修复组织缺损,可最大限度地恢复手功能和外形,减少致残率,缩短疗程,获得较好的临床疗效。 相似文献
66.
Stephen F. Quinn Joseph J. Haberman Steven W. Fitzgerald Paul D. Traughber Rod I. Belkin William T. Murray 《Journal of magnetic resonance imaging : JMRI》1994,4(2):169-172
The evaluation of loose bodies in the elbow is usually done by means of clinical examination, radiography, and postarthrographic computed tomography (CT). The authors review their experience with magnetic resonance (MR) imaging in place of postarthrographic CT for the evaluation of loose bodies in the elbow. The prospective interpretation of MR studies of the elbow in 20 patients was compared with arthroscopic findings. All elbows were imaged in multiple planes with thin sections, surface coils, and combinations of T1, T2, and proton-density weighting. The sensitivity for showing loose bodies with MR imaging was 100%, and the specificity was 67%. Because this was a nonblinded study, the results are biased and caution must be used when extrapolating these results to the general population. In this limited experience, MR imaging has reliably shown loose bodies in the elbow, and in the authors' institutions has replaced postarthrographic CT for that purpose. 相似文献
67.
1972至1992年共收治颅脑损伤1075例,其中颅脑合并伤142例,占同期颅脑损伤的13.2%。治愈92例,治愈率64.8%;死亡43例,病死率30.3%;伤残7例。作者强调处理这类伤时要详细了解病史,全面体检,对其临床表现做了阐述,并提出了正确掌握处理程序,手术时优先处理致命伤。 相似文献
68.
C. J. English W. M. Maclaren C. Court-Brown S. P. F. Hughes R. W. Porter W. A. Wallace R. J. Graves A. J. Pethick C. A. Soutar 《American journal of industrial medicine》1995,27(1):75-90
To make a preliminary assessment of whether upper limb soft tissue disorders might be associated with activities at work, we have conducted a case-control study of subjects attending orthopedic clinics in three cities. All subjects between the ages of 16 and 65 years, in whom defined soft tissue conditions of the upper limb were diagnosed by the participating orthopedic surgeons, were invited to take part. Controls were subjects attending the same clinics within the same age range whose clinical diagnosis did not include disease of the upper limb, cervical or thoracic spine. Information concerning repetitive movements of the upper limbs at work was elicited by questionnaire. Five hundred eighty cases and 996 controls were studied, representing 96% and 93%, respectively, of those invited to participate. The diagnoses of the cases included soft tissue conditions affecting the shoulder, elbow, forearm, wrist, thumb, hand, and fingers. The diagnoses of the controls included traumatic, degenerative, and inflammatory conditions, mostly of the legs and lower back. Women predominated among the cases (70%) and men among the controls (56%). Of 221 female cases with injury to the wrist and forearm, 32 were cleaner/domestics (14.5%) compared to 35 of 439 controls (8%), a difference statistically significant at the 2 1/2% level. Other jobs significantly overrepresented (5% level) among female cases with injuries at various anatomical sites included hairdressers, secretary/temps, assembly line workers, and machine operators (type unspecified). Among male cases, electricians were significantly overrepresented (5% level). Jobs for which there was a suggestion (p < 0.1) of overrepresentation among cases included butchers and teacher/ lecturers (both males only) and the combined job groups (chosen a priori for analysis) of keyboard operators, machine operators, and music teachers (all three jobs, females only). 相似文献
69.
某化工厂1987~2000年164例工伤事故调查分析 总被引:2,自引:0,他引:2
目的调查分析某化工厂工伤事故的分布规律及其危险因素,以便采取相应的预防干预措施。方法对1987~2000年该化工厂发生的工伤事故进行回顾性调查分析,建立数据库,并统计分析。结果 ①事故以轻伤为主,约占80.0%。②事故类别主要是灼烫烧伤和机械伤害,分别为工伤事故总数的35.8%、28.5%。③工伤伤害性质以骨折多见,约为总数的56.1%。④受伤工人的年龄分布以30~40岁段为主,约为总数的31.1%。⑤工伤事故原因中注意力不集中和违反操作规程分别为总数的43.0%,38.3%。结论12根据上述流行病学特点,采取相应的措施来减少工伤事故的发生。 相似文献
70.
V. Leroy Young Mary K. Seaton Christine A. Feely Cynthia Arfken Dorothy F. Edwards Carolyn M. Baum Samuel Logan 《American journal of industrial medicine》1995,27(3):419-431
On-site testing of 157 poultry processors disclosed that 50% had three or more abnormal upper extremity findings out of a total of 22 possibles. The average worker had five to six abnormal findings. Impaired pinch strength, decreased vibration sensitivity in the fingertips, and reports of current numbness were the most prevalent. Of workers with signs, 25% reported no symptoms, whereas only 8% of workers reported symptoms but had no signs. The investigators concluded that this measurement method has utility for assessments of worker populations to determine prevalence of CTDs and, potentially, for preclinical detection of these disorders to permit early intervention, reduce medical costs, and minimize disability. The need for accurate measurement to enhance early detection and prevention is discussed. 相似文献