首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   22788篇
  免费   1488篇
  国内免费   131篇
耳鼻咽喉   210篇
儿科学   599篇
妇产科学   589篇
基础医学   3590篇
口腔科学   365篇
临床医学   1880篇
内科学   5734篇
皮肤病学   564篇
神经病学   2498篇
特种医学   484篇
外科学   2095篇
综合类   100篇
一般理论   11篇
预防医学   1726篇
眼科学   434篇
药学   1580篇
中国医学   54篇
肿瘤学   1894篇
  2024年   20篇
  2023年   261篇
  2022年   473篇
  2021年   999篇
  2020年   515篇
  2019年   792篇
  2018年   832篇
  2017年   628篇
  2016年   713篇
  2015年   770篇
  2014年   1053篇
  2013年   1210篇
  2012年   1854篇
  2011年   1920篇
  2010年   1059篇
  2009年   958篇
  2008年   1492篇
  2007年   1539篇
  2006年   1413篇
  2005年   1302篇
  2004年   1129篇
  2003年   1022篇
  2002年   870篇
  2001年   126篇
  2000年   87篇
  1999年   147篇
  1998年   159篇
  1997年   121篇
  1996年   103篇
  1995年   86篇
  1994年   57篇
  1993年   51篇
  1992年   60篇
  1991年   57篇
  1990年   59篇
  1989年   50篇
  1988年   40篇
  1987年   36篇
  1986年   38篇
  1985年   29篇
  1984年   20篇
  1983年   24篇
  1982年   21篇
  1981年   21篇
  1980年   20篇
  1979年   20篇
  1978年   13篇
  1975年   16篇
  1974年   15篇
  1971年   11篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
1.
2.
3.
Obesity Surgery - Laparoscopic sleeve gastrectomy (LSG) is increasingly playing a key role in obesity management. Such operations, however, carry complications sometimes including leaks. The...  相似文献   
4.
5.
The present study aimed at measuring seropositivities for infection by Ascaris suum and Toxocara canis using the excretory/secretory (E/S) antigens from Ascaris suum (AES) and Toxocara canis (TES) within an indigenous population. In addition, quantification of cytokine expressions in peripheral blood cells was determined. A total of 50 Warao indigenous were included; of which 43 were adults and seven children. In adults, 44.1% were seropositive for both parasites; whereas children had only seropositivity to one or the other helminth. For ascariosis, the percentage of AES seropositivity in adults and children was high; 23.3% and 57.1%, respectively. While that for toxocariosis, the percentage of TES seropositivity in adults and children was low; 9.3% and 14.3%, respectively. The percentage of seronegativity was comparable for AES and TES antigens in adults (27.9%) and children (28.6%). When positive sera were analyzed by Western blotting technique using AES antigens; three bands of 97.2, 193.6 and 200.2 kDas were mostly recognized. When the TES antigens were used, nine major bands were mostly identified; 47.4, 52.2, 84.9, 98.2, 119.1, 131.3, 175.6, 184.4 and 193.6 kDas. Stool examinations showed that Blastocystis hominis, Hymenolepis nana and Entamoeba coli were the most commonly observed intestinal parasites. Quantification of cytokines IFN-γ, IL-2, IL-6, TGF-β, TNF-α, IL-10 and IL-4 expressions showed that there was only a significant increased expression of IL-4 in indigenous with TES seropositivity (p < 0.002). Ascaris and Toxocara seropositivity was prevalent among Warao indigenous.  相似文献   
6.
7.
8.

Background

The Lancet Commission on Global Surgery highlighted global surgical need but offered little insight into the specific surgical challenges of children in low-resource settings. Efforts to strengthen the quality of global pediatric surgical care have resulted in a proliferation of partnerships between low-and middle-income countries (LMICs) and high-income countries (HICs). Standardized tools able to reliably measure gaps in delivery and quality of care are important aids for these partnerships. We undertook a systematic review (SR) of capacity assessment tools (CATs) focused on needs assessment in pediatric surgery.

Methods

A comprehensive search strategy of multiple electronic databases was conducted per PRISMA guidelines without linguistic or temporal restrictions. CATs were selected according to pre-defined inclusion criteria. Articles were assessed by two independent reviewers. Methodological quality of studies was appraised using the COSMIN checklist with 4-point scale.

Results

The search strategy generated 16,641 original publications, of which three CATs were deemed eligible. Eligible tools were either excessively detailed or oversimplified. None used weighted scores to identify finer granularity between institutions. No CATs comprehensively included measures of resources, outcomes, accessibility/impact and training.

Discussion

The results of this study identify the need for a CAT capable of objectively measuring key aspects of surgical capacity and performance in a weighted tool designed for pediatric surgical centers in LMICs.

Type of Study

Systematic Review.

Level of Evidence

II.  相似文献   
9.
Journal of Thrombosis and Thrombolysis - C1-inhibitor (C1INH) was shown to enhance thrombin generation (TG) in the presence of thrombomodulin (TM) by reducing production of activated protein C....  相似文献   
10.
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号