全文获取类型
收费全文 | 939篇 |
免费 | 72篇 |
国内免费 | 3篇 |
专业分类
耳鼻咽喉 | 7篇 |
儿科学 | 45篇 |
妇产科学 | 5篇 |
基础医学 | 151篇 |
口腔科学 | 15篇 |
临床医学 | 64篇 |
内科学 | 204篇 |
皮肤病学 | 5篇 |
神经病学 | 34篇 |
特种医学 | 95篇 |
外科学 | 138篇 |
综合类 | 4篇 |
预防医学 | 90篇 |
眼科学 | 8篇 |
药学 | 62篇 |
中国医学 | 3篇 |
肿瘤学 | 84篇 |
出版年
2023年 | 11篇 |
2022年 | 30篇 |
2021年 | 37篇 |
2020年 | 19篇 |
2019年 | 25篇 |
2018年 | 30篇 |
2017年 | 14篇 |
2016年 | 29篇 |
2015年 | 37篇 |
2014年 | 34篇 |
2013年 | 38篇 |
2012年 | 63篇 |
2011年 | 53篇 |
2010年 | 33篇 |
2009年 | 33篇 |
2008年 | 50篇 |
2007年 | 30篇 |
2006年 | 34篇 |
2005年 | 57篇 |
2004年 | 37篇 |
2003年 | 43篇 |
2002年 | 42篇 |
2001年 | 17篇 |
2000年 | 27篇 |
1999年 | 27篇 |
1998年 | 10篇 |
1997年 | 8篇 |
1996年 | 6篇 |
1995年 | 3篇 |
1994年 | 4篇 |
1993年 | 7篇 |
1992年 | 13篇 |
1991年 | 9篇 |
1990年 | 9篇 |
1989年 | 14篇 |
1988年 | 11篇 |
1987年 | 6篇 |
1986年 | 7篇 |
1985年 | 4篇 |
1984年 | 5篇 |
1983年 | 3篇 |
1982年 | 3篇 |
1981年 | 3篇 |
1979年 | 4篇 |
1978年 | 3篇 |
1974年 | 3篇 |
1972年 | 5篇 |
1966年 | 5篇 |
1935年 | 3篇 |
1910年 | 2篇 |
排序方式: 共有1014条查询结果,搜索用时 15 毫秒
31.
Trevor C. Chen Tsung‐Jen Yang Min‐Jyue Huang Ho‐Seng Wang Kuo‐Wei Tseng Hsin‐Lian Chen Kazunori Nosaka 《Scandinavian journal of medicine & science in sports》2019,29(5):725-735
This study compared nine resistance eccentric exercises targeting arm, leg, and trunk muscles in one session for changes in maximal voluntary isometric contraction strength (MVC), delayed onset muscle soreness (DOMS), plasma creatine kinase (CK) activity, and myoglobin (Mb) concentration after the first and second bouts. Fifteen sedentary men (20‐25 years) performed 5 sets of 10 eccentric contractions with 80% of MVC load for the elbow flexors (EF), elbow extensors (EE), pectoralis, knee extensors (KE), knee flexors (KF), plantar flexors (PF), latissimus, abdominis, and erector spinae (ES) in a randomized order and repeated the same exercises 2 weeks later. MVC decreased at 1 (16%‐57%) to 4 (13%‐49%) days, DOMS developed (peak: 43‐70 mm), and CK activity (peak: 23 238‐207 304 IU/L) and Mb concentration showed large increases after the first bout. The magnitude of decrease in MVC was greater (P < 0.05) for EF, EE, and PEC than others and for KF than KE, PF, and ES. DOMS was greater (P < 0.05) for EF, EE, and ES than others. Changes in all measures were smaller (P < 0.05) after the second than the first bout, and the magnitude of the repeated bout effect was similar among the muscles. Plasma CK activity and Mb concentration did not increase significantly after the second exercise bout. It was concluded that muscle damage was greater for arm than leg muscles, and muscle proteins in the blood increased to a critical level after unaccustomed whole‐body resistance exercises, but the magnitude of damage was largely attenuated for all muscles similarly after the second bout. 相似文献
32.
Clinical Features and Prognosis of Generalized Lymphatic Anomaly,Kaposiform Lymphangiomatosis,and Gorham–Stout Disease 下载免费PDF全文
33.
Relapsed infant MLL‐rearranged acute lymphoblastic leukemia with additional genetic alterations 下载免费PDF全文
34.
35.
Impact of Breast Density Legislation on Breast Cancer Risk Assessment and Supplemental Screening: A Survey of 110 Radiology Facilities 下载免费PDF全文
Lina Nayak MD Kanae K. Miyake MD PhD Jessica W. T. Leung MD Elissa R. Price MD Yueyi I. Liu MD PhD Bonnie N. Joe MD PhD Edward A. Sickles MD William R. Thomas MD Jafi A. Lipson MD Bruce L. Daniel MD Jonathan Hargreaves MD R. James Brenner MD JD Lawrence W. Bassett MD Haydee Ojeda‐Fournier MD Karen K. Lindfors MD MPH Stephen A. Feig MD Debra M. Ikeda MD 《The breast journal》2016,22(5):493-500
Breast density notification laws, passed in 19 states as of October 2014, mandate that patients be informed of their breast density. The purpose of this study is to assess the impact of this legislation on radiology practices, including performance of breast cancer risk assessment and supplemental screening studies. A 20‐question anonymous web‐based survey was emailed to radiologists in the Society of Breast Imaging between August 2013 and March 2014. Statistical analysis was performed using Fisher's exact test. Around 121 radiologists from 110 facilities in 34 USA states and 1 Canadian site responded. About 50% (55/110) of facilities had breast density legislation, 36% of facilities (39/109) performed breast cancer risk assessment (one facility did not respond). Risk assessment was performed as a new task in response to density legislation in 40% (6/15) of facilities in states with notification laws. However, there was no significant difference in performing risk assessment between facilities in states with a law and those without (p < 0.831). In anticipation of breast density legislation, 33% (16/48), 6% (3/48), and 6% (3/48) of facilities in states with laws implemented handheld whole breast ultrasound (WBUS), automated WBUS, and tomosynthesis, respectively. The ratio of facilities offering handheld WBUS was significantly higher in states with a law than in states without (p < 0.001). In response to breast density legislation, more than 33% of facilities are offering supplemental screening with WBUS and tomosynthesis, and many are performing formal risk assessment for determining patient management. 相似文献
36.
CT‐Guided Wire Localization for Involved Axillary Lymph Nodes After Neo‐adjuvant Chemotherapy in Patients With Initially Node‐Positive Breast Cancer 下载免费PDF全文
Long Trinh MD Kanae K. Miyake MD PhD Frederick M. Dirbas MD Nishita Kothary MD Kathleen C. Horst MD Jafi A. Lipson MD Catherine Carpenter MD Atalie C. Thompson MPH Debra M. Ikeda MD 《The breast journal》2016,22(4):390-396
Resection of biopsy‐proven involved axillary lymph nodes (iALNs) is important to reduce the false‐negative rates of sentinel lymph node (SLN) biopsy after neo‐adjuvant chemotherapy (NAC) in patients with initially node‐positive breast cancer. Preoperative wire localization for iALNs marked with clips placed during biopsy is a technique that may help the removal of iALNs after NAC. However, ultrasound (US)‐guided localization is often difficult because the clips cannot always be reliably visible on US. Computed tomography (CT)‐guided wire localization can be used; however, to date there have been no reports on CT‐guided wire localization for iALNs. The aim of this study was to describe a series of patients who received CT‐guided wire localization for iALN removal after NAC and to evaluate the feasibility of this technique. We retrospectively analyzed five women with initially node‐positive breast cancer (age, 41–52 years) who were scheduled for SLN biopsy after NAC and received preoperative CT‐guided wire localization for iALNs. CT visualized all the clips that were not identified on post‐NAC US. The wire tip was deployed beyond or at the target, with the shortest distance between the wire and the index clip ranging from 0 to 2.5 mm. The total procedure time was 21–38 minutes with good patient tolerance and no complications. In four of five cases, CT wire localization aided in identification and resection of iALNs that were not identified with lymphatic mapping. Residual nodal disease was confirmed in two cases: both had residual disease in wire‐localized lymph nodes in addition to SLNs. Although further studies with more cases are required, our results suggest that CT‐guided wire localization for iALNs is a feasible technique that facilitates identification and removal of the iALNs as part of SLN biopsy after NAC in situations where US localization is unsuccessful. 相似文献
37.
Hara Yasumasa Arai Midori A. Sakai Kanae Ishikawa Naoki Gonoi Tohru Yaguchi Takashi Ishibashi Masami 《Journal of natural medicines》2018,72(1):280-289
Journal of Natural Medicines - A new amide, named dehydropropylpantothenamide (1), was obtained by a co-culture of Nocardia tenerifensis IFM 10554T in the presence of the mouse macrophage-like cell... 相似文献
38.
39.
40.
Y Nakagawa K Yufu S Nakamori T Kimura H Yokoi T Tamura N Hamasaki H Nosaka M Nobuyoshi 《Catheterization and cardiovascular interventions》2000,50(1):40-47
In order to identify predictors of late restenosis after GFX stent implantation, procedural and 6-month clinical and angiographic follow-up data of prospectively entered 141 consecutive lesions treated with a single long (24 or 30 mm) GFX stent were compared to 66 consecutive lesions requiring a single short (12 or 18 mm) stent. The initial clinical success rate of 97% and thrombosis rate of 1.4% with long stents were similar to 97% and 0% with short stents (P = NS). Their respective binary restenosis rates were 34.7% and 23.3% for long and short stents as a whole (P = NS), but being 10.0% for 12 mm, 26.0% for 18 mm, 31.3% for 24 mm, and 39.2% for 30 mm. When proximal and distal reference diameters at baseline were compared between the lesions with and without restenosis, proximal reference diameters were not statistically different (3.02+/-0.42 mm vs. 3.18+/-0.62 mm) and the restenosis group had significantly smaller distal reference diameters (2.15+/-0.48 mm vs. 2.55+/-0.53 mm, P<0.0001). The treatment of long lesions with single long-stent implantation can be accomplished with high success and low complication rates. Single long-stent implantation may be effective, if the distal reference size of the long narrowing is big enough to accept the stent. 相似文献