全文获取类型
收费全文 | 8972篇 |
免费 | 1196篇 |
国内免费 | 13篇 |
专业分类
耳鼻咽喉 | 77篇 |
儿科学 | 319篇 |
妇产科学 | 374篇 |
基础医学 | 1237篇 |
口腔科学 | 183篇 |
临床医学 | 1871篇 |
内科学 | 1506篇 |
皮肤病学 | 100篇 |
神经病学 | 780篇 |
特种医学 | 393篇 |
外国民族医学 | 1篇 |
外科学 | 1002篇 |
综合类 | 203篇 |
一般理论 | 3篇 |
预防医学 | 843篇 |
眼科学 | 134篇 |
药学 | 702篇 |
中国医学 | 9篇 |
肿瘤学 | 444篇 |
出版年
2023年 | 79篇 |
2021年 | 127篇 |
2020年 | 84篇 |
2019年 | 115篇 |
2018年 | 200篇 |
2017年 | 197篇 |
2016年 | 178篇 |
2015年 | 199篇 |
2014年 | 241篇 |
2013年 | 313篇 |
2012年 | 343篇 |
2011年 | 390篇 |
2010年 | 229篇 |
2009年 | 224篇 |
2008年 | 332篇 |
2007年 | 364篇 |
2006年 | 360篇 |
2005年 | 346篇 |
2004年 | 315篇 |
2003年 | 297篇 |
2002年 | 276篇 |
2001年 | 293篇 |
2000年 | 279篇 |
1999年 | 278篇 |
1998年 | 167篇 |
1997年 | 167篇 |
1996年 | 138篇 |
1995年 | 126篇 |
1994年 | 120篇 |
1993年 | 111篇 |
1992年 | 241篇 |
1991年 | 223篇 |
1990年 | 249篇 |
1989年 | 207篇 |
1988年 | 177篇 |
1987年 | 181篇 |
1986年 | 149篇 |
1985年 | 146篇 |
1984年 | 128篇 |
1983年 | 121篇 |
1982年 | 67篇 |
1981年 | 70篇 |
1979年 | 112篇 |
1978年 | 83篇 |
1977年 | 78篇 |
1976年 | 102篇 |
1975年 | 87篇 |
1974年 | 80篇 |
1973年 | 83篇 |
1972年 | 83篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
1.
Deitelzweig Steve Luo Xuemei Nguyen Jennifer L. Malhotra Deepa Emir Birol Russ Cristina Li Xiaoyan Lee Theodore C. Ferri Mauricio Wiederkehr Danny Reimbaeva Maya Barnes Geoffrey D. Piazza Gregory 《Journal of thrombosis and thrombolysis》2022,54(4):696-696
Journal of Thrombosis and Thrombolysis - 相似文献
2.
3.
4.
5.
Fluid role boundaries: exploring the contribution of the advanced nurse practitioner to multi‐professional palliative care
下载免费PDF全文
![点击此处可从《Journal of clinical nursing》网站下载免费的PDF全文](/ch/ext_images/free.gif)
6.
7.
8.
MR compatibility of Guglielmi detachable coils 总被引:6,自引:0,他引:6
9.
A Decade of Change in Obesity Surgery 总被引:4,自引:0,他引:4
Edward E Mason MD PhD Shenghui Tang MS Kathleen E Renquist BS Dwight T Barnes Joseph J Cullen MD Cornelius Doherty MD James W Maher MD 《Obesity surgery》1997,7(3):189-197
Background: The International (formerly National) Bariatric Surgery Registry began collecting data in January 1986. The aim
of this study was to examine changes in the practice of surgical treatment of severe obesity that occurred during the decade
of 1986 through 1995, as observed in the IBSR data. Methods: All data submitted to the IBSR during the decade were transferred
to the IBM mainframe computer for analysis. Characteristics of operative type populations were compared over time using analysis
of variance (ANOVA) for age, body mass index (BMI), operative weight and Chi-square (χ2) test for gender. Results: There has been a steady increase over the decade in mean patient weight. The operations used have
changed from predominantly ‘simple’ operations to more frequent use of ‘complex’ operations. Within the categories of ‘simple’
and ‘complex’, an increase in the variety of operations occurred. As a group, patients with ‘simple’ operations have been
heavier, more often male and public pay patients than those who have undergone ‘complex’ operations. One year weight loss
was greater for Roux-en-Y gastric bypass (RGB) than vertical banded gastroplasty (VBG), but follow-up rates were too low to
study the relative merits of the operations used. The reported incidence of operative mortality and serious complications
(leak with peritonitis, abscess and pulmonary embolism) remained low. Conclusions: These observations and their implications
can be summarized in three statements which relate to action for improved patient care in the beginning of the new century:
(1) increasing weight of candidates for surgical treatment during this decade indicates the need for earlier use of operative
treatment before irreversible complications of obesity can develop; (2) low risk of obesity surgery, decreasing postoperative
hospital stay, and early weight control support the continued and increased use of surgical treatment; (3) continued widespread
use of both ‘simple’ and ‘complex’ operations with increased modifications of standard RGB and VBG procedures emphasizes the
need for standardized long-term data and analyses regarding both weight control and postoperative side-effects. 相似文献
10.
Prostaglandin F2 alpha enhancement of capsaicin induced cough in man: modulation by beta 2 adrenergic and anticholinergic drugs. 总被引:10,自引:7,他引:3
下载免费PDF全文
![点击此处可从《Thorax》网站下载免费的PDF全文](/ch/ext_images/free.gif)
The effect of inhaled prostaglandin (PG) F2 alpha on the response to the inhaled tussive agent capsaicin was investigated in normal subjects. Seven subjects inhaled three breaths of four doses of capsaicin (0.3, 0.6, 1.2, and 2.4 nmol) before and immediately after inhaling PGF2 alpha (0.1 mumol) or placebo (0.15M NaCl) on separate days. The numbers of capsaicin induced coughs were greater after PGF2 alpha (mean 42.3 coughs) than after 0.15M sodium chloride (30.1). Visual analogue scores (0-10 on a 10 cm continuous scale) showed that capsaicin was more irritant after PGF2 alpha than after saline. Total respiratory resistance (Rrs), measured by the forced oscillation technique, was unaltered throughout the study. A double blind, placebo controlled study of the effects of inhaled salbutamol (200 micrograms, 0.6 mumol) and ipratropium bromide (40 micrograms, 0.1 mumol) on cough induced by capsaicin (2.4 nmol) and by PGF2 alpha (0.1 mumol) and on PGF2 alpha augmented, capsaicin induced coughing was performed in seven subjects. Neither drug had any effect on capsaicin induced coughing. Salbutamol reduced coughing due to PGF2 alpha (mean 7.7 coughs after salbutamol, 9.3 after placebo) but ipratropium bromide did not (mean 6.9 coughs after ipratropium bromide, 6.6 after placebo). Salbutamol also inhibited the augmentation of the capsaicin induced cough that followed inhalation of PGF2 alpha (mean augmentation 1.9 coughs after salbutamol, 4.1 after placebo), whereas ipratropium bromide did not (augmentation 1.7 coughs after ipratropium bromide, 2.7 after placebo). No changes in Rrs were seen after PGF2 alpha or either drug. Thus salbutamol reduces PGF2 alpha induced cough and the augmentation of capsaicin induced cough that follows PGF2 alpha. 相似文献