全文获取类型
收费全文 | 46906篇 |
免费 | 2497篇 |
国内免费 | 166篇 |
专业分类
耳鼻咽喉 | 608篇 |
儿科学 | 2841篇 |
妇产科学 | 863篇 |
基础医学 | 5464篇 |
口腔科学 | 1272篇 |
临床医学 | 3376篇 |
内科学 | 8797篇 |
皮肤病学 | 1284篇 |
神经病学 | 2846篇 |
特种医学 | 1354篇 |
外科学 | 7428篇 |
综合类 | 1380篇 |
一般理论 | 19篇 |
预防医学 | 2291篇 |
眼科学 | 1630篇 |
药学 | 4593篇 |
1篇 | |
中国医学 | 379篇 |
肿瘤学 | 3143篇 |
出版年
2023年 | 393篇 |
2022年 | 1085篇 |
2021年 | 1917篇 |
2020年 | 1079篇 |
2019年 | 1210篇 |
2018年 | 1701篇 |
2017年 | 1203篇 |
2016年 | 1553篇 |
2015年 | 1565篇 |
2014年 | 2307篇 |
2013年 | 2610篇 |
2012年 | 3797篇 |
2011年 | 3687篇 |
2010年 | 2198篇 |
2009年 | 1773篇 |
2008年 | 2442篇 |
2007年 | 2493篇 |
2006年 | 2238篇 |
2005年 | 1996篇 |
2004年 | 1789篇 |
2003年 | 1530篇 |
2002年 | 1280篇 |
2001年 | 847篇 |
2000年 | 767篇 |
1999年 | 646篇 |
1998年 | 297篇 |
1997年 | 241篇 |
1996年 | 244篇 |
1995年 | 207篇 |
1994年 | 172篇 |
1993年 | 148篇 |
1992年 | 402篇 |
1991年 | 376篇 |
1990年 | 387篇 |
1989年 | 356篇 |
1988年 | 316篇 |
1987年 | 269篇 |
1986年 | 262篇 |
1985年 | 263篇 |
1984年 | 194篇 |
1983年 | 137篇 |
1982年 | 76篇 |
1981年 | 85篇 |
1980年 | 75篇 |
1979年 | 127篇 |
1978年 | 76篇 |
1977年 | 98篇 |
1976年 | 72篇 |
1973年 | 66篇 |
1971年 | 63篇 |
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
31.
32.
33.
34.
35.
36.
37.
V Bhattacharya G R Reddy Sunish Goyal Umesh Kumar 《Journal of plastic, reconstructive & aesthetic surgery》2007,60(8):892-897
Defects involving the distal leg and foot are frequently encountered following various aetiological factors. Paucity of local tissue causes surgeons to resort to the retrograde peninsular flap, the cross leg flap or the free flap. With specific knowledge of perforators, the fasciocutaneous flap from the calf area can be transferred to the defect in a single stage based on skeletonised distal perforators. The surgical anatomy, flap planning and procedure have been detailed. Nineteen patients were treated during the period 1995 to 2005. The perforators were identified preoperatively by audio Doppler. The flaps were marked and dissected proximal to the defect skeletonising the distal perforators under loupe magnification and transferred to the defect in a single stage. The donor site was skin grafted. Out of 19 cases, 16 flaps healed uneventfully, one flap necrosed completely and in two cases there was marginal necrosis. The cases were followed up for 2-10 years with an average of 6 years. With detailed knowledge of perforators one can safely reconstruct distal moderate-size defects of the lower limb in a single stage, thus having the benefits of free tissue transfer without resorting to microsurgery. This technique has proved to be an advancement in the reconstructive repertoire allowing flaps of non conventional dimensions to be perfused by skeletonised perforators. 相似文献
38.
Suresh Kumar Masilamani Annamalai Rachel Buckingham John Cashman 《Journal of children's orthopaedics》2007,1(2):107-113
The treatment of Legg-Calvé-Perthes disease remains controversial. The aim of this survey was to ascertain the current management
strategies of this condition amongst UK paediatric orthopaedic surgeons, with particular regard to containment procedures
in the fragmentation phase. Questionnaires were distributed at the January 2006 meeting of the British Society for Children’s
Orthopaedic Surgery (BSCOS) and was posted to all absent members. The results showed a great deal of variability not only
in the treatment of Perthes disease, but also in the decision-making processes. Consideration must now be given to a carefully
constructed national multi-centre prospective randomised controlled study into the optimum management of this disease 相似文献
39.
40.
Sandeep Nijhawan Mukul Rastogi Ashish Joshi Atul Shende Manish Tandon Dinesh Singla Amit Mathur Subhash Nepalia Ramesh Roop Rai 《Digestive endoscopy》2007,19(2):80-82
Background: Ingestion of coins is a common clinical problem in children. Many of the coins are ferromagnetic and can be retrieved with the help of a magnet. We describe the use of a novel endoscopic accessory for removing ferromagnetic coins. Material and methods: Two magnet discs of 1.5 cm diameter were joined to a 200 cm steel wire of 0.75 mm thickness with a terminal 5 cm spring. A Teflon tube (160 cm, 7 F) was used along with this instrument as a sleeve. The use of this accessory was analyzed prospectively in subjects presenting with a history of coin ingestion. The time taken for removal of coins, complications during the procedure and failure rate was noted. Effect of the magnet on cardiac rhythm was also noted during the procedure. Results: A total of 55 children (mean age 5.1 ± 2.3 years) with coin ingestion presented over a period of 1 year. Forty‐four coins were ferromagnetic. All ferromagnetic coins were removed successfully. Mean time for removal was 68 ± 22 s. No complications were encountered. Conclusion: The novel magnetic instrument is precise, safe and quick for the removal of ferromagnetic coins under direct vision. 相似文献