全文获取类型
收费全文 | 33367篇 |
免费 | 1707篇 |
国内免费 | 210篇 |
专业分类
耳鼻咽喉 | 395篇 |
儿科学 | 650篇 |
妇产科学 | 469篇 |
基础医学 | 4546篇 |
口腔科学 | 648篇 |
临床医学 | 2031篇 |
内科学 | 8692篇 |
皮肤病学 | 715篇 |
神经病学 | 2614篇 |
特种医学 | 1398篇 |
外国民族医学 | 1篇 |
外科学 | 5658篇 |
综合类 | 188篇 |
一般理论 | 1篇 |
预防医学 | 881篇 |
眼科学 | 678篇 |
药学 | 2180篇 |
中国医学 | 71篇 |
肿瘤学 | 3468篇 |
出版年
2023年 | 152篇 |
2022年 | 101篇 |
2021年 | 612篇 |
2020年 | 349篇 |
2019年 | 449篇 |
2018年 | 629篇 |
2017年 | 487篇 |
2016年 | 563篇 |
2015年 | 610篇 |
2014年 | 914篇 |
2013年 | 1005篇 |
2012年 | 1776篇 |
2011年 | 2010篇 |
2010年 | 1144篇 |
2009年 | 1060篇 |
2008年 | 1812篇 |
2007年 | 1995篇 |
2006年 | 1953篇 |
2005年 | 2061篇 |
2004年 | 2106篇 |
2003年 | 2073篇 |
2002年 | 2019篇 |
2001年 | 706篇 |
2000年 | 720篇 |
1999年 | 716篇 |
1998年 | 532篇 |
1997年 | 422篇 |
1996年 | 413篇 |
1995年 | 349篇 |
1994年 | 312篇 |
1993年 | 299篇 |
1992年 | 487篇 |
1991年 | 423篇 |
1990年 | 424篇 |
1989年 | 385篇 |
1988年 | 360篇 |
1987年 | 326篇 |
1986年 | 297篇 |
1985年 | 288篇 |
1984年 | 243篇 |
1983年 | 187篇 |
1982年 | 120篇 |
1981年 | 117篇 |
1980年 | 115篇 |
1979年 | 131篇 |
1978年 | 111篇 |
1977年 | 119篇 |
1975年 | 86篇 |
1974年 | 85篇 |
1972年 | 84篇 |
排序方式: 共有10000条查询结果,搜索用时 514 毫秒
1.
Hori Hiroki Ohta Asuka Matsui Honami Yano Kanako Morita-Tominaka Miyuki Linn Zayar Masumoto Daisuke Okumura Yosuke Okamura Satoshi Kurihara Kosuke Hayakawa Akira Rikiishi Takeshi Kobayashi Kyoko 《International journal of clinical oncology / Japan Society of Clinical Oncology》2022,27(1):245-252
International Journal of Clinical Oncology - The practice of cancer diagnosis disclosure to children has been changed with the times. The regulations of clinical trials in the 2000s might change... 相似文献
2.
Toshihiro Yoshitake Akira Takeda Kensaku Ohki Yuko Inoue Takanori Yamawaki Saori Otsuka Minekatsu Akimoto Mitsuru Nemoto Yasuhito Shimakura Akio Sato 《The Journal of dermatology》2015,42(7):735-738
Finasteride is standard medical treatment for androgenetic alopecia; however, no large studies with 5 years or more of follow up have been performed in Japan. The authors followed Japanese men with androgenetic alopecia treated with finasteride for 5 years to evaluate long‐term treatment efficacy. Of 903 men treated with finasteride (1 mg/day), 801 patients were evaluated over 5 years by modified global photographic assessment. Although the proportion of improvement was high (99.4%), modified global photographic assessment scores after 5 years of treatment were lower in patients with more advanced disease as measured by the modified Norwood–Hamilton scale. After separating patients into “sufficient” and “insufficient” efficacy groups according to the modified global photographic assessment score after 5 years (scores ≥6 and <6, respectively), multivariate analysis showed that independent risk factors of insufficient efficacy were age at start of treatment of 40 years or more (P = 0.021) and classification on the modified Norwood–Hamilton scale (P < 0.001), whereas presence of stress at start of treatment was a negative predictor (P = 0.025). In conclusion, continuous finasteride treatment for 5 years improved androgenetic alopecia with sustained effect among Japanese. Younger age and less advanced disease at start of treatment were the key predictors of higher finasteride efficacy. 相似文献
3.
4.
5.
Akira Mogi Toshiki Yajima Kenji Tomizawa Ryoichi Onozato Shigebumi Tanaka Hiroyuki Kuwano 《Annals of thoracic and cardiovascular surgery》2015,21(5):435-439
Purpose: Small pulmonary lesions that include ground-glass attenuation have been increasingly discovered because of progressive imaging diagnostic technologies. Despite the detection of such small lesions, sometimes it is quite difficult to localize them because of their size or considerable depth from the visceral pleura. In the present study, we examined the usefulness of computed tomography-guided lipiodol marking for thoracoscopic resection of impalpable pulmonary nodules.Methods: Fifty-six patients with an undiagnosed peripheral lesion(s) of the lung who had undergone preoperative computed tomography-guided lipiodol marking followed by video-assisted thoracoscopic surgery were studied.Results: All of the nodules were successfully marked by computed tomography-guided lipiodol marking, and all except for one case were localized by means of intraoperative fluoroscopy as clear spots. With regard to complications, pneumothorax occurred in 21 patients (37.5%), and only one patient required transient drainage. Although hemorrhaging in the lung parenchyma and hemosputum occurred in nine patients (16.1%) and one patient (1.8%), respectively, no patients were in serious condition. No intra- or postoperative mortality or morbidity was observed.Conclusion: Preoperative computed tomography-guided lipiodol marking of small or impalpable pulmonary nodules is a safe and useful procedure for thoracoscopic resection of the lung. 相似文献
6.
Journal of Neurology - 相似文献
7.
Rahul S. Loungani Marat Fudim Dave Ranney Ajar Kochar Marc D. Samsky Desiree Bonadonna Akinobu Itoh Hiroo Takayama Koji Takeda Daniel Wojdyla Adam D. DeVore Mani Daneshmand 《Journal of cardiac failure》2021,27(3):327-337
BackgroundVenoarterial extracorporeal membrane oxygenation (VA-ECMO) is increasingly used as a life-saving therapy for patients with cardiovascular collapse, but identifying patients unlikely to benefit remains a challenge.Methods and ResultsWe created the RESCUE registry, a retrospective, observational registry of adult patients treated with VA-ECMO between January 2007 and June 2017 at 3 high-volume centers (Columbia University, Duke University, and Washington University) to describe short-term patient outcomes. In 723 patients treated with VA-ECMO, the most common indications for deployment were postcardiotomy shock (31%), cardiomyopathy (including acute heart failure) (26%), and myocardial infarction (17%). Patients frequently suffered in-hospital complications, including acute renal dysfunction (45%), major bleeding (41%), and infection (33%). Only 40% of patients (n = 290) survived to discharge, with a minority receiving durable cardiac support (left ventricular assist device [n = 48] or heart transplantation [n = 7]). Multivariable regression analysis identified risk factors for mortality on ECMO as older age (odds ratio [OR], 1.26; 95% confidence interval [CI], 1.12–1.42) and female sex (OR, 1.44; 95% CI, 1.02–2.02) and risk factors for mortality after decannulation as higher body mass index (OR 1.17; 95% CI, 1.01-1.35) and major bleeding while on ECMO support (OR, 1.92; 95% CI, 1.23–2.99).ConclusionsDespite contemporary care at high-volume centers, patients treated with VA-ECMO continue to have significant in-hospital morbidity and mortality. The optimization of outcomes will require refinements in patient selection and improvement of care delivery. 相似文献
8.
Comparative safety study on severe anemia by simeprevir versus telaprevir‐based triple therapy for chronic hepatitis C 下载免费PDF全文
Eiichi Ogawa Norihiro Furusyo Eiji Kajiwara Hideyuki Nomura Akira Kawano Kazuhiro Takahashi Kazufumi Dohmen Takeaki Satoh Koichi Azuma Makoto Nakamuta Toshimasa Koyanagi Kazuhiro Kotoh Shinji Shimoda Jun Hayashi The Kyushu University Liver Disease Study Group 《Journal of gastroenterology and hepatology》2015,30(8):1309-1316
9.
10.