全文获取类型
收费全文 | 3323204篇 |
免费 | 279538篇 |
国内免费 | 13491篇 |
专业分类
耳鼻咽喉 | 45116篇 |
儿科学 | 103365篇 |
妇产科学 | 84569篇 |
基础医学 | 532135篇 |
口腔科学 | 89440篇 |
临床医学 | 300508篇 |
内科学 | 580131篇 |
皮肤病学 | 90786篇 |
神经病学 | 283041篇 |
特种医学 | 131539篇 |
外国民族医学 | 229篇 |
外科学 | 514208篇 |
综合类 | 100470篇 |
现状与发展 | 23篇 |
一般理论 | 2225篇 |
预防医学 | 276261篇 |
眼科学 | 76302篇 |
药学 | 233981篇 |
27篇 | |
中国医学 | 9986篇 |
肿瘤学 | 161891篇 |
出版年
2021年 | 55359篇 |
2020年 | 35282篇 |
2019年 | 58207篇 |
2018年 | 71262篇 |
2017年 | 54359篇 |
2016年 | 60085篇 |
2015年 | 74237篇 |
2014年 | 108525篇 |
2013年 | 173839篇 |
2012年 | 90226篇 |
2011年 | 89787篇 |
2010年 | 116336篇 |
2009年 | 120851篇 |
2008年 | 76195篇 |
2007年 | 78788篇 |
2006年 | 89616篇 |
2005年 | 84517篇 |
2004年 | 86155篇 |
2003年 | 77081篇 |
2002年 | 66765篇 |
2001年 | 107117篇 |
2000年 | 99941篇 |
1999年 | 98875篇 |
1998年 | 65067篇 |
1997年 | 62874篇 |
1996年 | 60624篇 |
1995年 | 56188篇 |
1994年 | 50069篇 |
1993年 | 46821篇 |
1992年 | 68027篇 |
1991年 | 64374篇 |
1990年 | 61426篇 |
1989年 | 60539篇 |
1988年 | 55530篇 |
1987年 | 54015篇 |
1986年 | 51214篇 |
1985年 | 50937篇 |
1984年 | 46672篇 |
1983年 | 42698篇 |
1982年 | 40784篇 |
1981年 | 38382篇 |
1980年 | 36319篇 |
1979年 | 37671篇 |
1978年 | 33361篇 |
1977年 | 31344篇 |
1976年 | 28144篇 |
1975年 | 27036篇 |
1974年 | 27210篇 |
1973年 | 26178篇 |
1972年 | 24574篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
81.
Hommes Franziska Mohsenpour Amir Kropff Dana Pilgram Lisa Matusall Svenja von Philipsborn Peter Sell Kerstin 《Bundesgesundheitsblatt, Gesundheitsforschung, Gesundheitsschutz》2022,65(1):96-106
Bundesgesundheitsblatt - Gesundheitsforschung - Gesundheitsschutz - Akteure der öffentlichen Gesundheit (Public Health) tragen wesentlich zu Gesundheitsschutz, -förderung und... 相似文献
82.
Post-induction hypotension is common and associated with postoperative complications. We hypothesised that pneumatic leg compression reduces post-induction hypotension in elderly patients undergoing robot-assisted laparoscopic prostatectomy. In this double-blind randomised study, patients were allocated randomly to the pneumatic leg compression group (n = 50) or control (n = 50). In the intervention group, pneumatic leg compression was initiated before induction of anaesthesia. In the control group, pneumatic leg compression was initiated 20 min after anaesthesia induction. The primary outcome was the incidence of post-induction hypotension in these groups. Post-induction hypotension was defined as systolic blood pressure < 90 mmHg during the first 20 min after induction. Haemodynamic variables and area under the curve of post-induction systolic blood pressure over time were assessed. Complications associated with pneumatic leg compression were recorded, including: peripheral neuropathy; compartment syndrome; extensive bullae beneath the leg sleeves; and pulmonary thromboembolism. The incidence of post-induction hypotension decreased in the pneumatic leg compression group compared with that in the control group; 5 (10%) vs. 29 (58%), respectively, p < 0.001. In the pneumatic leg compression group, the lowest systolic, diastolic and mean blood pressures 20 min after induction of anaesthesia were significantly greater than the control group. Pneumatic leg compression resulted in an increased area under the curve of systolic blood pressure in the first 20 min after induction, p = 0.001. There were no pneumatic leg compression-related complications. Pneumatic leg compression reduced post-induction hypotension in elderly patients undergoing robot-assisted laparoscopic prostatectomy, suggesting that it is an effective and safe intervention to prevent post-induction hypotension among elderly patients undergoing general anaesthesia. 相似文献
83.
84.
Malunguja Gisandu K. Devi Ashalata 《Proceedings of the National Academy of Sciences, India. Section B.》2022,92(1):105-120
Proceedings of the National Academy of Sciences, India Section B: Biological Sciences - Heavy metal concentrations in surface soils of Reserved Forests (RFs) have a significant impact on... 相似文献
85.
86.
87.
卫逸涛肖惠敏谢银环孙丽军 《中华健康管理学杂志》2022,(8):547-552
目的了解老年人生命晚期获知疾病相关信息意向及影响因素。方法2016年10月至2017年6月,采用生命晚期疾病信息意向问卷,利用方便抽样法对福州市中心城区7所养老机构及15个社区的414例年龄≥60岁的老年人进行横断面调查,采用单因素分析、多元线性回归与有序多分类logistic回归分析老年人对疾病相关信息的需求水平、获知程度意向及其影响因素。结果414例老年人疾病相关信息需求得分为(17.1±4.9)分;48.8%(202/414)希望详尽知晓,30.7%(127/414)希望选择性了解,20.5%(85/414)不想知道任何信息;多元线性回归分析显示,年龄、文化程度、是否接受/见过其他生命维持治疗(LSTs)是影响老年人疾病相关信息需求水平的主要因素(标准化回归系数分别为-0.141、0.116、0.115,均P<0.05);有序多分类logistic分析显示,年龄(以60~69岁为参照,70~79岁:OR=0.544,95%CI:0.310~0.957;80~89岁:OR=0.526,95%CI:0.289~0.956)、文化程度(以小学及以下为参照,大专及以上:OR=2.166,95%CI:1.093~4.290)、主要生活费来源(以其他补贴为参照,家人支持:OR=7.303,95%CI:1.157~46.108;退休金:OR=9.288,95%CI:1.502~57.415;公积金/储蓄:OR=15.676,95%CI:2.122~115.793)、是否接受/见过其他LSTs(以是为参照,OR=1.985,95%CI:1.150~3.425)是影响老年人疾病相关信息获知程度意向的主要因素。结论老年人生命晚期获知疾病相关信息的意向程度较高,年龄、文化程度、主要生活费来源、是否接受/见过其他生命维持治疗等是其主要影响因素。 相似文献
88.
89.
Byrne Emma Abel Stephen Yu Alexander Shepard Matthew Karlovits Stephen M. Wegner Rodney E. 《Journal of neuro-oncology》2022,157(1):197-205
Journal of Neuro-Oncology - Adjuvant radiation is often used in patients with low grade gliomas with high-risk characteristics with a recommended dose of 45–54 Gy. We used the... 相似文献
90.
Purnima Gogoi Geetika Kaur Nikhlesh K Singh 《World journal of gastroenterology : WJG》2022,28(46):6497-6511
Colorectal cancer (CRC) is the third most diagnosed cancer and the second leading cause of cancer-related mortality in the United States. Across the globe, people in the age group older than 50 are at a higher risk of CRC. Genetic and environmental risk factors play a significant role in the development of CRC. If detected early, CRC is preventable and treatable. Currently, available screening methods and therapies for CRC treatment reduce the incidence rate among the population, but the micrometastasis of cancer may lead to recurrence. Therefore, the challenge is to develop an alternative therapy to overcome this complication. Nanotechnology plays a vital role in cancer treatment and offers targeted chemotherapies directly and selectively to cancer cells, with enhanced therapeutic efficacy. Additionally, nanotechnology elevates the chances of patient survival in comparison to traditional chemotherapies. The potential of nanoparticles includes that they may be used simultaneously for diagnosis and treatment. These exciting properties of nanoparticles have enticed researchers worldwide to unveil their use in early CRC detection and as effective treatment. This review discusses contemporary methods of CRC screening and therapies for CRC treatment, while the primary focus is on the theranostic approach of nanotechnology in CRC treatment and its prospects. In addition, this review aims to provide knowledge on the advancement of nanotechnology in CRC and as a starting point for researchers to think about new therapeutic approaches using nanotechnology. 相似文献