全文获取类型
收费全文 | 10828篇 |
免费 | 629篇 |
国内免费 | 58篇 |
专业分类
耳鼻咽喉 | 125篇 |
儿科学 | 277篇 |
妇产科学 | 222篇 |
基础医学 | 1562篇 |
口腔科学 | 175篇 |
临床医学 | 788篇 |
内科学 | 2808篇 |
皮肤病学 | 322篇 |
神经病学 | 1064篇 |
特种医学 | 363篇 |
外科学 | 1255篇 |
综合类 | 60篇 |
一般理论 | 1篇 |
预防医学 | 390篇 |
眼科学 | 198篇 |
药学 | 835篇 |
中国医学 | 27篇 |
肿瘤学 | 1043篇 |
出版年
2023年 | 67篇 |
2022年 | 45篇 |
2021年 | 204篇 |
2020年 | 145篇 |
2019年 | 231篇 |
2018年 | 241篇 |
2017年 | 182篇 |
2016年 | 218篇 |
2015年 | 241篇 |
2014年 | 322篇 |
2013年 | 386篇 |
2012年 | 653篇 |
2011年 | 691篇 |
2010年 | 399篇 |
2009年 | 374篇 |
2008年 | 611篇 |
2007年 | 690篇 |
2006年 | 660篇 |
2005年 | 678篇 |
2004年 | 633篇 |
2003年 | 546篇 |
2002年 | 574篇 |
2001年 | 245篇 |
2000年 | 213篇 |
1999年 | 203篇 |
1998年 | 100篇 |
1997年 | 77篇 |
1996年 | 74篇 |
1995年 | 56篇 |
1994年 | 73篇 |
1993年 | 55篇 |
1992年 | 148篇 |
1991年 | 130篇 |
1990年 | 144篇 |
1989年 | 137篇 |
1988年 | 138篇 |
1987年 | 125篇 |
1986年 | 112篇 |
1985年 | 100篇 |
1984年 | 60篇 |
1983年 | 60篇 |
1982年 | 27篇 |
1981年 | 33篇 |
1979年 | 48篇 |
1972年 | 26篇 |
1970年 | 32篇 |
1969年 | 35篇 |
1968年 | 26篇 |
1967年 | 28篇 |
1966年 | 26篇 |
排序方式: 共有10000条查询结果,搜索用时 31 毫秒
1.
Tomoe Koizumi PhD Yodo Sugishita MD PhD Yuki Suzuki-Takahashi MD PhD Kazuko Nara MA Tomoko Miyagawa MA Misako Nakajima MA Kouhei Sugimoto MD PhD Manabu Futamura MD PhD Tatsuro Furui MD PhD Yasushi Takai MD PhD Hiroshi Matsumoto MD PhD Hideko Yamauchi MD Shinji Ohno MD PhD Akemi Kataoka MD PhD Kiyotaka Kawai MD PhD Eisuke Fukuma MD PhD Hiroko Nogi MD PhD Koichiro Tsugawa MD PhD Nao Suzuki MD PhD 《Cancer》2023,129(16):2568-2580
2.
Cody M. Lebeck Lee MD Ioannis A. Ziogas MD Rajiv Agarwal MD Sophoclis P. Alexopoulos MD Kristen K. Ciombor MD Lea K. Matsuoka MD Daniel B. Brown MD Cathy Eng MD 《Cancer》2022,128(12):2243-2257
The 5-year overall survival rate of a patient with unresectable metastatic colorectal cancer is poor at approximately 14%. Similarly, historical data on liver transplantation (LT) in those with colorectal liver metastases (CRLM) showed poor outcomes, with 5-year survival rates between 12% and 21%. More recently, limited data have shown improved outcomes in select patients with 5-year overall survival rates of approximately 60%. Despite these reported survival improvements, there is no significant improvement in disease-free survival. Given the uncertain benefit with this therapeutic approach and a renewed investigational interest, we aimed to conduct a contemporary systematic review on LT for CRLM. A systematic review of the literature was performed according to the preferred reporting items for systematic reviews and meta-analysis statement. English articles reporting on data regarding LT for CRLM were identified through the MEDLINE (via PubMed), Cochrane Library, and ClinicalTrials.gov databases (last search date: December 16th, 2021) by 2 researchers independently. A total of 58 studies (45 published and 13 ongoing) were included. Although early retrospective studies suggest the possibility that some carefully selected patients may benefit from LT, there is minimal prospective data on the topic and LT remains exploratory in the setting of CRLM. Additionally, several other challenges, such as the limited availability of deceased donor organs and defining appropriate selection criteria, remain when considering the implementation of LT for these patients. Further evidence from ongoing prospective trials is needed to determine if and to what extent there is a role for LT in patients with surgically unresectable CRLM. 相似文献
3.
4.
Tomoko Mizota Nicholas E. Anton Dimitrios Stefanidis 《American journal of surgery》2019,217(2):222-227
Background
This study aimed to identify differences in pattern recognition skill among individuals with varying surgical experience.Methods
Participants reviewed laparoscopic cholecystectomy videos of various difficulty, and paused them when the cystic duct or artery was identified to outline each structure on the monitor. Time taken to identify each structure, accuracy and work load, which was assessed using the NASA-Task Load Index (TLX), were compared among the three groups.Results
Ten students, ten residents and eight attendings participated in the study. Attendings identified the cystic duct and artery significantly faster and more accurately than students, and identified the cystic artery faster than residents. The NASA-TLX score of attendings was significantly lower than that of students and residents.Conclusions
Attendings identified anatomical structures faster, more accurately, and with less effort than students or residents. This platform may be valuable for the assessment and teaching of pattern recognition skill to novice surgeons.Short summary
Accurate anatomical recognition is paramount to proceeding safely in surgery. The assessment platform used in this study differentiated recognition skill among individuals with varing surgical experience. 相似文献5.
Kazuma Murata Kenji Endo Takato Aihara Hidekazu Suzuki Yuji Matsuoka Hirosuke Nishimura Taichiro Takamatsu Takuya Kusakabe Asato Maekawa Kengo Yamamoto 《European spine journal》2020,29(3):413-419
DHS is characterized by chin-on-chest deformity and devastatingly impedes activities of daily living in affected individuals. There is a paucity of literature about the pathophysiology of DHS including knowledge about spinal sagittal alignment. We conducted this study to clarify the relationship between cervical sagittal alignment and global sagittal balance in DHS. This is a retrospective radiographic study of a case series of DHS. Forty-one patients with diagnosed DHS were enrolled. Measurements were made using lateral standing radiograph. C2–C7 sagittal vertical axis (SVA) was estimated as 52.0 ± 2.4 mm. Among sagittal parameters, C7–S1 SVA positively correlated with C2–C7 angle (C2–C7 A) (r = 0.33). For the correlations between C7 and S1 SVA and C2–C7 A, both logistic and linear regression models were used to determine the threshold for C2–C7 A value responsible for global sagittal balance. C2–C7 A of − 15.0 and 6.0 were predicted by logistic and linear regression models and were considered responsible for the occurrence of global positive imbalance. Therefore, we divided into two groups, namely, cervical kyphosis group (C type) and diffuse kyphosis group (D type) by median value of C2–C7 A. Enlarged thoracic kyphosis and global positive imbalance were observed in D type compared to C type. C2–C7 A exhibited correlations with cervical balance and also with global balance. There should be various type of thoraco-lumbar alignment in DHS. These slides can be retrieved under Electronic Supplementary Material. 相似文献
6.
7.
8.
9.
10.