全文获取类型
收费全文 | 36237篇 |
免费 | 1999篇 |
国内免费 | 243篇 |
专业分类
耳鼻咽喉 | 438篇 |
儿科学 | 730篇 |
妇产科学 | 382篇 |
基础医学 | 4871篇 |
口腔科学 | 963篇 |
临床医学 | 2703篇 |
内科学 | 8671篇 |
皮肤病学 | 644篇 |
神经病学 | 2966篇 |
特种医学 | 1495篇 |
外科学 | 5668篇 |
综合类 | 233篇 |
现状与发展 | 2篇 |
预防医学 | 1379篇 |
眼科学 | 576篇 |
药学 | 3110篇 |
中国医学 | 110篇 |
肿瘤学 | 3538篇 |
出版年
2023年 | 174篇 |
2021年 | 677篇 |
2020年 | 376篇 |
2019年 | 560篇 |
2018年 | 667篇 |
2017年 | 544篇 |
2016年 | 659篇 |
2015年 | 760篇 |
2014年 | 983篇 |
2013年 | 1206篇 |
2012年 | 1749篇 |
2011年 | 1828篇 |
2010年 | 1040篇 |
2009年 | 888篇 |
2008年 | 1517篇 |
2007年 | 1552篇 |
2006年 | 1584篇 |
2005年 | 1596篇 |
2004年 | 1519篇 |
2003年 | 1419篇 |
2002年 | 1482篇 |
2001年 | 1327篇 |
2000年 | 1459篇 |
1999年 | 1257篇 |
1998年 | 403篇 |
1997年 | 305篇 |
1996年 | 307篇 |
1995年 | 283篇 |
1994年 | 275篇 |
1993年 | 264篇 |
1992年 | 836篇 |
1991年 | 760篇 |
1990年 | 776篇 |
1989年 | 825篇 |
1988年 | 727篇 |
1987年 | 668篇 |
1986年 | 641篇 |
1985年 | 601篇 |
1984年 | 465篇 |
1983年 | 350篇 |
1982年 | 195篇 |
1980年 | 166篇 |
1979年 | 303篇 |
1978年 | 230篇 |
1977年 | 180篇 |
1974年 | 172篇 |
1973年 | 163篇 |
1971年 | 171篇 |
1970年 | 159篇 |
1969年 | 184篇 |
排序方式: 共有10000条查询结果,搜索用时 46 毫秒
1.
2.
3.
4.
5.
Kenji Takagishi Tetsuya Matsuura Takashi Masatomi Etsuo Chosa Tsuyoshi Tajika Tetsu Iwama Mikihiko Watanabe Toshiro Otani Katsunori Inagaki Hiroyasu Ikegami Mitsuhiro Aoki Toru Okuwaki Yasushi Kameyama Maeda Akira Koji Kaneoka Masaaki Sakamoto Moroe Beppu 《Journal of orthopaedic science》2019,24(4):708-714
BackgroundDespite proposals and guidelines to prevent baseball injuries in young players by societies and organizations, many shoulder and elbow injuries continue to occur among junior high school baseball players. In order to investigate the training conditions of junior high school baseball players and the risk factors for shoulder and elbow pain in the players, we conducted a questionnaire survey among junior high school baseball players throughout the country.MethodsThe questionnaire survey was conducted among junior high school baseball players in September 2016.ResultsA total of 11,134 junior high school baseball players belonging to 495 teams responded to the survey. Among these, 4004 players trained every day of the week and 1151 players played baseball games every month with no off-season. Among 9752 players who did not have shoulder and/or elbow pain in the spring and summer of 2015, 19.2% of players experienced elbow pain over the course of one year, 13.6% of players experienced shoulder pain, and 28.0% complained of shoulder and/or elbow pain. The frequency of elbow pain was more than that of shoulder pain. At risk for shoulder pain were pitchers and catchers and second-year students, while risk factors for elbow pain were playing pitcher and catcher positions, pitching or throwing ≥300 balls per week, playing ≥10 games on average per month and being left-handed.ConclusionRisk factors for shoulder pain were different from those for elbow pain. To prevent elbow pain, coaches should pay attention to pitchers and catchers and left-handed players and not allow players to pitch or throw ≥300 full-power balls per week or participate in ≥10 games per month. They should also pay attention to pitchers and catchers and second-year students to prevent shoulder pain. It is important for coaches to train multiple pitchers and catchers. 相似文献
6.
Eric So Bryan Van Dyke Maria R. McGann Roberto Brandao David Larson Christopher F. Hyer 《The Journal of foot and ankle surgery》2019,58(1):62-65
The Lapidus bunionectomy is performed to treat hallux valgus. Recurrence of the deformity remains a concern. A transverse intermetatarsal screw spanning the base of the first metatarsal to the base of the second can increase stability. The neurovascular bundle is located within the proximity of this screw. In this study, we assessed the structures at risks with the use of this technique. In 10 specimens, a guide wire was placed, and a 4.0-mm cannulated screw was inserted. The neurovascular bundle was dissected and inspected for direct trauma to the neurovascular bundle, and the proximity of the screw was measured using a digital caliper. Ten cadaveric specimens were used. The dorsalis pedis artery and deep peroneal nerve were free from injury in 9 of 10 specimens. In those 9 specimens, the neurovascular bundle was located dorsal in relation to the screw. The mean distance of the screw to the neurovascular bundle was 7.1 ± 3.3 mm. The mean distance from the screw to the first tarsometatarsal joint (TMTJ) was 14.7 ± 4.3 mm. The mean distance from the screw as it entered the second metatarsal to the second TMTJ was 18.0 ± 7.2 mm. In 1 specimen, the screw was found to be traversing through the neurovascular bundle. The distance from the screw to the first TMTJ was 15.0 mm. The distance of the screw from where it entered the second metatarsal to the second TMTJ was 24.0 mm. Although the intermetatarsal screw avoided the neurovascular cases in most instances, there is some anatomic risk to the neurovascular bundle. Further study is warranted to evaluate clinical results using the intermetatarsal screw for the modified Lapidus procedure. 相似文献
7.
8.
Azusa Ikeda Yoshihiro Watanabe Hikari Kaba Kimihiko Kaneko Toshiyuki Takahashi Saoko Takeshita 《Brain & development》2019,41(4):367-372
Background
Myelin oligodendrocyte glycoprotein antibodies (MOG Abs) are frequently detected in pediatric acquired demyelinating syndrome (ADS), and MOG-Ab-positive ADS differs from multiple sclerosis (MS) and aquaporin-4 (AQP4)-Ab-positive neuromyelitis optica spectrum disorder (NMOSD) in terms of age distribution, therapeutic response, and prognosis.Methods
Based on medical records, we retrospectively evaluated patients with MOG-Ab-positive NMOSD treated in the acute phase who were followed up in the chronic phase at our hospital from January 2011 to December 2017.Results
The patients comprised two boys and two girls aged 3–12 (median, 8) years. Peak MOG-Ab titers were 1:2048 to 1:32768 (median, 1:10240), and the relapse rate ranged from 0 to 1.25 times/year (median, 0.59 times/year); no sequelae were observed in any cases. Lesions other than those of optic neuritis were distributed at the cortex in one patient, subcortical white matter in four, deep white matter in three, and brainstem in one, all of which were disseminated lesions. No lesions were found in the corpus callosum, periventricular white matter, diencephalon, and regions adjacent to the third and fourth ventricles. The lesions tended to be asymptomatic, and two patients aged >5?years had well-demarcated lesions.Conclusion
All the patients showed disseminated lesions in the subcortical region to deep white matter, which were different from those found in MS and AQP4-Ab-positive NMOSD and were consistent with the characteristics of brain lesions in MOG-Ab-positive ADS, including other disease types. 相似文献9.