全文获取类型
收费全文 | 29282篇 |
免费 | 1438篇 |
国内免费 | 163篇 |
专业分类
耳鼻咽喉 | 357篇 |
儿科学 | 507篇 |
妇产科学 | 517篇 |
基础医学 | 3764篇 |
口腔科学 | 692篇 |
临床医学 | 2094篇 |
内科学 | 8077篇 |
皮肤病学 | 349篇 |
神经病学 | 2253篇 |
特种医学 | 924篇 |
外科学 | 4997篇 |
综合类 | 132篇 |
一般理论 | 1篇 |
预防医学 | 825篇 |
眼科学 | 464篇 |
药学 | 1967篇 |
中国医学 | 67篇 |
肿瘤学 | 2896篇 |
出版年
2023年 | 129篇 |
2022年 | 269篇 |
2021年 | 477篇 |
2020年 | 275篇 |
2019年 | 335篇 |
2018年 | 456篇 |
2017年 | 369篇 |
2016年 | 463篇 |
2015年 | 497篇 |
2014年 | 650篇 |
2013年 | 809篇 |
2012年 | 1291篇 |
2011年 | 1425篇 |
2010年 | 754篇 |
2009年 | 714篇 |
2008年 | 1344篇 |
2007年 | 1496篇 |
2006年 | 1384篇 |
2005年 | 1385篇 |
2004年 | 1365篇 |
2003年 | 1383篇 |
2002年 | 1378篇 |
2001年 | 979篇 |
2000年 | 997篇 |
1999年 | 904篇 |
1998年 | 419篇 |
1997年 | 318篇 |
1996年 | 316篇 |
1995年 | 287篇 |
1994年 | 246篇 |
1993年 | 206篇 |
1992年 | 648篇 |
1991年 | 689篇 |
1990年 | 581篇 |
1989年 | 583篇 |
1988年 | 560篇 |
1987年 | 521篇 |
1986年 | 457篇 |
1985年 | 451篇 |
1984年 | 347篇 |
1983年 | 265篇 |
1979年 | 248篇 |
1978年 | 159篇 |
1977年 | 163篇 |
1974年 | 146篇 |
1973年 | 131篇 |
1972年 | 147篇 |
1971年 | 133篇 |
1969年 | 139篇 |
1967年 | 134篇 |
排序方式: 共有10000条查询结果,搜索用时 31 毫秒
1.
Susumu Shibasaki Koichi Suda Masaya Nakauchi Kenichi Nakamura Kenji Kikuchi Kazuki Inaba Ichiro Uyama 《World journal of gastroenterology : WJG》2020,26(11):1172-1184
BACKGROUND Minimally invasive surgery for gastric cancer(GC) has gained widespread use as a safe curative procedure especially for early GC.AIM To determine risk factors for postoperative complications after minimally invasive gastrectomy for GC.METHODS Between January 2009 and June 2019, 1716 consecutive patients were referred to our division for primary GC. Among them, 1401 patients who were diagnosed with both clinical and pathological Stage Ⅲ or lower GC and underwent robotic gastrectomy(RG) or laparoscopic gastrectomy(LG) were enrolled. Retrospective chart review and multivariate analysis were performed for identifying risk factors for postoperative morbidity.RESULTS Morbidity following minimally invasive gastrectomy was observed in 7.5% of the patients. Multivariate analyses demonstrated that non-robotic minimally invasive surgery, male gender, and an operative time of ≥ 360 min were significant independent risk factors for morbidity. Therefore, morbidity was compared between RG and LG. Accordingly, propensity-matched cohort analysis revealed that the RG group had significantly fewer intra-abdominal infectious complications than the LG group(2.5% vs 5.9%, respectively; P = 0.038), while no significant differences were noted for other local or systemic complications.Multivariate analyses of the propensity-matched cohort revealed that non-robotic minimally invasive surgery [odds ratio = 2.463(1.070–5.682); P = 0.034] was a significant independent risk factor for intra-abdominal infectious complications.CONCLUSION The findings showed that robotic surgery might improve short-term outcomes following minimally invasive radical gastrectomy by reducing intra-abdominal infectious complications. 相似文献
2.
3.
4.
5.
Heterozygous nonsense mutations near the C‐terminal region of IGF1R in two patients with small‐for‐gestational‐age‐related short stature 下载免费PDF全文
6.
Marie Ohata Susumu Fujiwara Ai Yoshioka Hiroshi Nagai Shintaro Sugita Nozomi Yamano Yusuke Inoue Chikako Nishigori 《Pediatric dermatology》2019,36(6):997-998
Fibroblastic connective tissue nevus (FCTN) is a benign cutaneous mesenchymal lesion characterized by proliferation of CD34‐positive fibroblastic/myofibroblastic spindle‐shaped cells. We report a case of agminated FCTN on the right lower abdomen of a 1‐year‐old boy. 相似文献
7.
8.
Koji Saito Takashi Saito Sumio Kawada 《Nihon Shokakibyo Gakkai zasshi》2006,103(10):1176, 1179-1176, 1180
9.
Masahiro Yamauchi Hiroko Kusano Etsuko Saito Takeshi Iwata Masashi Nakakura Yasuki Kato Takaaki Uochi Shiro Akinaga Noboru Aoki 《Journal of controlled release》2006,114(2):268-275
Previously, we demonstrated that wrapping dextran fluorescein anionic/cationic lipid complexes with neutral lipids produced a stable formulation that markedly increased the duration of the compound in plasma after intravenous administration to rats. The improved drug-delivery properties of the wrapped liposomes (WL) relative to other formulations suggested that this technology could offer important advantages for the administration of other polyanionic drugs, including antisense oligodeoxynucleotides (ODN). In the present study, we investigated the value of WL for formulating fluorescence-labeled phosphorothioated ODN (F-ODN). WL encapsulating F-ODN/cationic lipid complexes were prepared efficiently using similar methodology to that used in our earlier study. Studies confirmed that these WL were stable in vitro. Following intravenous administration to mice, free F-ODN and naked F-ODN/cationic lipid complexes were rapidly eliminated whereas administration of the WL resulted in high blood concentrations of drug that were maintained for several hours. Additional studies were conducted in mice that were inoculated with tumor cells (Caki-1 xenograft model, human kidney); in these experiments, intravenous administration of WL delivered 13 times more F-ODN to the tumor site than achieved after injection of free F-ODN. 相似文献