全文获取类型
收费全文 | 27125篇 |
免费 | 1409篇 |
国内免费 | 166篇 |
专业分类
耳鼻咽喉 | 301篇 |
儿科学 | 344篇 |
妇产科学 | 357篇 |
基础医学 | 3594篇 |
口腔科学 | 808篇 |
临床医学 | 1864篇 |
内科学 | 7017篇 |
皮肤病学 | 427篇 |
神经病学 | 1648篇 |
特种医学 | 909篇 |
外科学 | 4556篇 |
综合类 | 131篇 |
一般理论 | 1篇 |
预防医学 | 869篇 |
眼科学 | 573篇 |
药学 | 1834篇 |
中国医学 | 71篇 |
肿瘤学 | 3396篇 |
出版年
2023年 | 140篇 |
2022年 | 305篇 |
2021年 | 514篇 |
2020年 | 271篇 |
2019年 | 392篇 |
2018年 | 497篇 |
2017年 | 389篇 |
2016年 | 491篇 |
2015年 | 493篇 |
2014年 | 657篇 |
2013年 | 755篇 |
2012年 | 1171篇 |
2011年 | 1322篇 |
2010年 | 732篇 |
2009年 | 608篇 |
2008年 | 1103篇 |
2007年 | 1215篇 |
2006年 | 1197篇 |
2005年 | 1255篇 |
2004年 | 1237篇 |
2003年 | 1251篇 |
2002年 | 1163篇 |
2001年 | 919篇 |
2000年 | 929篇 |
1999年 | 898篇 |
1998年 | 333篇 |
1997年 | 274篇 |
1996年 | 291篇 |
1995年 | 227篇 |
1994年 | 208篇 |
1993年 | 198篇 |
1992年 | 705篇 |
1991年 | 633篇 |
1990年 | 584篇 |
1989年 | 654篇 |
1988年 | 556篇 |
1987年 | 517篇 |
1986年 | 522篇 |
1985年 | 477篇 |
1984年 | 307篇 |
1983年 | 236篇 |
1982年 | 137篇 |
1981年 | 104篇 |
1980年 | 114篇 |
1979年 | 221篇 |
1978年 | 171篇 |
1977年 | 137篇 |
1974年 | 112篇 |
1971年 | 119篇 |
1969年 | 126篇 |
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
991.
992.
Sachiyo Yoshio Tomonari Shimagaki Ryuki Hashida Takumi Kawaguchi Yuriko Tsutsui Yuzuru Sakamoto Yuichi Yoshida Hironari Kawai Shiori Yoshikawa Taiji Yamazoe Taizo Mori Yosuke Osawa Shinji Itoh Moto Fukai Tomoharu Yoshizumi Akinobu Taketomi Masaki Mori Tatsuya Kanto 《Hepatology research》2021,51(7):803-812
993.
994.
995.
An infant male presented with the rare anatomy consisting of situs solitus, concordant atrioventricular connections to L-looped ventricles, double outlet right ventricle (DORV), and hypoplastic aortic arch. 6 months after
neonatal aortic arch repair, the morphologic right ventricle function deteriorated, and surgical evaluation was
undertaken to determine if either biventricular repair with a systemic morphologic left ventricle or right ventricular exclusion was possible. After initial echocardiography, magnetic resonance imaging (MRI) was used to create detailed axial and 4-dimensional (4D) images and 3-dimensional (3D) printed models. The detailed anatomy
of this rare, complex case and its use in pre-surgical planning is presented. 相似文献
996.
Yasuhiro Matsubayashi MD Akihiro Yoshida PhD Hideki Suganami PhD Momoko Oe MS Takaaki Sato MD Yuta Yaguchi MD Kazuya Fujihara MD Takaho Yamada MD Shiro Tanaka PhD Kohei Kaku MD Hirohito Sone MD 《Diabetes, obesity & metabolism》2021,23(7):1660-1665
Sodium-glucose cotransporter-2 inhibitors (SGLT2) are drugs that have been reported to have several effects through the regulation of plasma volume, for example, antihypertensive effects. This study aimed to clarify the impact of long-term administration and subsequent discontinuation of the SGLT2 inhibitor tofogliflozin on estimated plasma volume (ePV), brain natriuretic peptide (BNP) and the relationship between changes in ePV, BNP and body weight (BW). Data from 157 participants with type 2 diabetes receiving tofogliflozin monotherapy in a phase 3 study were analysed. Changes in variables or correlations among them during a 52-week administration and a 2-week post-treatment period were investigated. Percent change in ePV was calculated using the Strauss formula. Significant decreases in BW, ePV and ln-transformed BNP (ln-BNP) were noted by week 52. %ΔBW was not significantly correlated with %ΔePV and Δln-BNP, while %ΔePV was significantly correlated with Δln-BNP. Two weeks after discontinuation of tofogliflozin, BW, ePV and ln-BNP were significantly increased. %ΔBW was significantly correlated with %ΔePV and Δln-BNP. Furthermore, ePV and BNP were significantly higher than baseline levels. 相似文献
997.
Takeshi Terashima Tatsuya Yamashita Noboru Takata Yasuhito Takeda Hidenori Kido Noriho Iida Masaaki Kitahara Tetsuro Shimakami Hajime Takatori Kuniaki Arai Kazunori Kawaguchi Kazuya Kitamura Taro Yamashita Yoshio Sakai Eishiro Mizukoshi Masao Honda Shuichi Kaneko 《Hepatology research》2021,51(2):190-200
998.
999.
Hiroshi Yoshida Tetsuya Shimizu Masato Yoshioka Nobuhiko Taniai 《Hepatology research》2021,51(3):251-262
Portal hypertension is most commonly caused by chronic liver disease. As liver damage progresses, portal pressure gradually elevates and hemodynamics of the portal system gradually change. In normal liver, venous returns from visceral organs join the portal trunk and flow into the liver (hepatopetal blood flow). As portal pressure increases due to liver damage, congestion of some veins of the visceral organ occurs (blood flow to and from). Finally, the direction of some veins (the left gastric vein in particular) of the visceral organ change (hepatofugal blood flow) and develop as collateral veins (portosystemic shunt) to reduce portal pressure. Therefore, esophagogastric varices serve as drainage veins for the portal venous system to reduce the portal pressure. In chronic liver disease, as intrahepatic vascular resistance is increased (backward flow theory) and collateral veins develop, adequate portal hypertension is required to maintain portal flow into the liver through an increase of blood flow into the portal venous system (forward flow theory). Splanchnic and systemic arterial vasodilatations increase the blood flow into the portal venous system (hyperdynamic state) and lead to portal hypertension and collateral formation. Hyperdynamic state, especially around the spleen, is detected in patients with portal hypertension. The spleen is a regulatory organ that maintains portal flow into the liver. In this review, surgical treatment, interventional radiology, endoscopic treatment, and pharmacotherapy for portal hypertension (esophagogastric varices in particular) are described based on the portal hemodynamics using schema. 相似文献
1000.
Masakazu Yamamoto Masahiro Yoshida Junji Furuse Keiji Sano Masayuki Ohtsuka Shingo Yamashita Toru Beppu Yukio Iwashita Keita Wada Takako Eguchi Nakajima Katsunori Sakamoto Koichi Hayano Yasuhisa Mori Koji Asai Ryusei Matsuyama Teijiro Hirashita Taizo Hibi Nozomu Sakai Tsutomu Tabata Hisato Kawakami Hiroyuki Takeda Takuro Mizukami Masato Ozaka Makoto Ueno Yoichi Naito Naohiro Okano Takayuki Ueno Susumu Hijioka Satoru Shikata Tomohiko Ukai Steven Strasberg Michael G. Sarr Palepu Jagannath Tsann‐Long Hwang Ho‐Seong Han Yoo‐Seok Yoon Hee Jung Wang Shao‐Ciao Luo Ren Adam Mariano Gimenez Olivier Scatton Do‐Youn Oh Tadahiro Takada 《Journal of hepato-biliary-pancreatic sciences》2021,28(1):1-25