全文获取类型
收费全文 | 15294篇 |
免费 | 1050篇 |
国内免费 | 283篇 |
专业分类
耳鼻咽喉 | 250篇 |
儿科学 | 260篇 |
妇产科学 | 288篇 |
基础医学 | 2375篇 |
口腔科学 | 197篇 |
临床医学 | 1281篇 |
内科学 | 3174篇 |
皮肤病学 | 518篇 |
神经病学 | 1209篇 |
特种医学 | 839篇 |
外科学 | 1963篇 |
综合类 | 138篇 |
现状与发展 | 1篇 |
一般理论 | 11篇 |
预防医学 | 807篇 |
眼科学 | 503篇 |
药学 | 1372篇 |
中国医学 | 161篇 |
肿瘤学 | 1280篇 |
出版年
2023年 | 82篇 |
2022年 | 238篇 |
2021年 | 401篇 |
2020年 | 230篇 |
2019年 | 374篇 |
2018年 | 427篇 |
2017年 | 333篇 |
2016年 | 471篇 |
2015年 | 627篇 |
2014年 | 785篇 |
2013年 | 837篇 |
2012年 | 1277篇 |
2011年 | 1287篇 |
2010年 | 805篇 |
2009年 | 672篇 |
2008年 | 856篇 |
2007年 | 925篇 |
2006年 | 788篇 |
2005年 | 772篇 |
2004年 | 642篇 |
2003年 | 517篇 |
2002年 | 524篇 |
2001年 | 266篇 |
2000年 | 275篇 |
1999年 | 240篇 |
1998年 | 124篇 |
1997年 | 103篇 |
1996年 | 101篇 |
1995年 | 80篇 |
1994年 | 59篇 |
1993年 | 60篇 |
1992年 | 152篇 |
1991年 | 142篇 |
1990年 | 116篇 |
1989年 | 148篇 |
1988年 | 113篇 |
1987年 | 105篇 |
1986年 | 93篇 |
1985年 | 80篇 |
1984年 | 65篇 |
1983年 | 44篇 |
1982年 | 29篇 |
1981年 | 34篇 |
1980年 | 31篇 |
1979年 | 32篇 |
1977年 | 24篇 |
1975年 | 24篇 |
1974年 | 28篇 |
1973年 | 24篇 |
1972年 | 25篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
1.
Hyun Jong Choi Jong Ho Moon Yun Nah Lee Hyun Su Kim Ji Su Ha Tae Hoon Lee Sang‐Woo Cha Young Deok Cho Sang‐Heum Park 《Digestive endoscopy》2015,27(7):772-775
Direct peroral cholangioscopy (POC) using an ultra‐slim upper endoscope is one modality of POC for intraductal endoscopic evaluation and treatment of the bile duct. Choledochoduodenostomy (CDS) is one modality of biliary bypass surgery that provides a new route to the bile duct. We carried out direct POC using an ultra‐slim upper endoscope without the use of accessories in 10 patients (four sump syndromes, three bile duct strictures and three intrahepatic duct stones) previously undergoing surgical CDS. Direct POC was successful in all patients. The use of an intraductal balloon catheter was required in one patient for advancement of the endoscope into the bile duct. Distal bile ducts with sump syndromes were cleared using baskets and water irrigation under direct POC. Cholangiocarcinoma was diagnosed in one patient with hilar bile duct stricture after cholangioscopic evaluation and a targeting forceps biopsy under direct POC. Intrahepatic duct stones were successfully extracted after intraductal fragmentation under direct POC. Oozing bleeding occurred during intraductal lithotripsy but stopped spontaneously. Direct POC using an ultra‐slim upper endoscope without the assistance of accessories can easily be carried out in patients undergoing CDS. 相似文献
2.
3.
Clinical usefulness of intraductal ultrasonography for the management of acute biliary pancreatitis
下载免费PDF全文
![点击此处可从《Journal of gastroenterology and hepatology》网站下载免费的PDF全文](/ch/ext_images/free.gif)
4.
5.
Three‐Dimensional Echocardiographic Evaluation of Mitral Apparatus during Preload Manipulation in Patients with Hypertrophic Cardiomyopathy
下载免费PDF全文
![点击此处可从《Echocardiography (Mount Kisco, N.Y.)》网站下载免费的PDF全文](/ch/ext_images/free.gif)
Hyemoon Chung M.D. Ji Hyun Yoon M.D. Young Won Yoon M.D. Ph.D. Ji Young Chung B.N. Jung‐Joon Cha M.D. Jong‐Youn Kim M.D. Ph.D. Pil‐Ki Min M.D. Ph.D. Byoung‐Kwon Lee M.D. Ph.D. Bum‐Kee Hong M.D. Ph.D. Se‐Joong Rim M.D. Ph.D. Hyuck Moon Kwon M.D. Eui‐Young Choi M.D. Ph.D. 《Echocardiography (Mount Kisco, N.Y.)》2015,32(8):1261-1269
6.
Jin Hwan Ahn Joon Ho Wang Jae Chul Yoo Sung Kon Kim Jung Ho Park Jong Woong Park 《Knee surgery, sports traumatology, arthroscopy》2006,14(12):1288-1291
This article describes a modified suture technique designed for the vertical repair of the anterior horn of the meniscus after arthroscopic decompression of a large meniscal cyst. This procedure comprises of three steps: first, the meniscus was pierced vertically using a suture hook and a No. 0 PDS suture. Second, both ends of the No. 0 PDS on the femoral and tibial surfaces of the meniscus were pulled to the outside of the joint capsule using a spinal needle preloaded with suture material. Finally, a skin incision was made adjacent to the suture materials, and both ends were tied. We recommend this technique not only for the vertical repair of the anterior horn of the meniscus after decompression of large meniscal cyst, but also to repair a longitudinal tear of the meniscus. 相似文献
7.
M. C. van den Heuvel K. P. de Jong M. Boot M. J. H. Slooff S. Poppema A. S. H. Gouw 《American journal of transplantation》2006,6(11):2660-2671
The finer branches of the biliary tree (FBBT) contain a regenerative compartment. We hypothesized that preservation of the FBBT together with its microvasculature will lead to recovery of biliary damage and prolonged preservation of bile ductules during the development of chronic liver allograft rejection. The interlobular bile ducts, portal bile ductules and extraportal biliary cells with and without microvessels were studied in sequential biopsies in five patients who fulfilled the Banff criteria of early chronic rejection (CR) (imminence group). Biopsies of CR patients (n = 12) served as controls. Biopsies were double immunostained with CD34 (microvessels) and cytokeratin 7 (biliary structures). Proliferation and proangiogenic activity were assessed with Ki67 and VEGF-A immunostaining. Severe damage of bile ducts in the imminence group did not progress to significant bile duct loss. This was associated with a high proliferative activity in all biliary structures and preservation of the microvascular compartment. VEGF-A expression was increased in all but the reperfusion biopsies. In conclusion, both regenerative activity of the FBBT and an intact microvascular compartment are associated with less damage of the biliary tree and could therefore be prerequisites for biliary regeneration. 相似文献
8.
J P Kappelhof G F Vrensen P T de Jong J Pameyer B Willekens 《American journal of ophthalmology》1986,101(1):58-69
In two pseudophakic human eyes, obtained post mortem, Elschnig's pearls were visible biomicroscopically. One eye contained a medallion lens and the other an iridocapsular lens (implanted for 53 months and 39 months, respectively). The medallion lens was fixed to the iris but was not attached to the Soemmerring's ring. Elschnig's pearls and star-shaped cells were found on the posterior capsule in the pupillary space. One loop of the iridocapsular lens was encased in the Soemmerring's ring whereas the other was located between the iris and the lens remnants. The Elschnig's pearls were on the anterior side of the ring; only a few were in the pupillary space. Two other pseudophakic eyes with clear posterior capsules also contained small numbers of Elschnig's pearls on or just near the peripheral lens remnants. 相似文献
9.