全文获取类型
收费全文 | 2037篇 |
免费 | 235篇 |
国内免费 | 19篇 |
专业分类
耳鼻咽喉 | 37篇 |
儿科学 | 93篇 |
妇产科学 | 48篇 |
基础医学 | 199篇 |
口腔科学 | 39篇 |
临床医学 | 238篇 |
内科学 | 375篇 |
皮肤病学 | 189篇 |
神经病学 | 222篇 |
特种医学 | 152篇 |
外科学 | 320篇 |
综合类 | 100篇 |
现状与发展 | 30篇 |
一般理论 | 1篇 |
预防医学 | 87篇 |
眼科学 | 16篇 |
药学 | 52篇 |
中国医学 | 3篇 |
肿瘤学 | 90篇 |
出版年
2024年 | 20篇 |
2023年 | 183篇 |
2022年 | 14篇 |
2021年 | 31篇 |
2020年 | 64篇 |
2019年 | 31篇 |
2018年 | 62篇 |
2017年 | 62篇 |
2016年 | 53篇 |
2015年 | 70篇 |
2014年 | 98篇 |
2013年 | 84篇 |
2012年 | 72篇 |
2011年 | 75篇 |
2010年 | 102篇 |
2009年 | 107篇 |
2008年 | 70篇 |
2007年 | 103篇 |
2006年 | 69篇 |
2005年 | 60篇 |
2004年 | 45篇 |
2003年 | 50篇 |
2002年 | 47篇 |
2001年 | 42篇 |
2000年 | 50篇 |
1999年 | 49篇 |
1998年 | 47篇 |
1997年 | 54篇 |
1996年 | 49篇 |
1995年 | 37篇 |
1994年 | 37篇 |
1993年 | 38篇 |
1992年 | 18篇 |
1991年 | 17篇 |
1990年 | 18篇 |
1989年 | 29篇 |
1988年 | 39篇 |
1987年 | 18篇 |
1986年 | 7篇 |
1985年 | 17篇 |
1984年 | 10篇 |
1982年 | 11篇 |
1981年 | 17篇 |
1980年 | 19篇 |
1978年 | 13篇 |
1977年 | 7篇 |
1976年 | 16篇 |
1975年 | 13篇 |
1973年 | 6篇 |
1971年 | 6篇 |
排序方式: 共有2291条查询结果,搜索用时 15 毫秒
1.
A mixed‐method study of effects of a therapeutic play intervention for children on parental anxiety and parents' perceptions of the intervention
下载免费PDF全文
![点击此处可从《Journal of advanced nursing》网站下载免费的PDF全文](/ch/ext_images/free.gif)
2.
Hysterosalpingography was performed in 31 patients by means of a low-dose scanning-beam digital radiographic system. The technique permits adequate evaluation of gynecologic abnormalities while allowing significant reduction in radiation: 2.4-mR (6.1 X 10(-7) C/kg) exposure to the skin and 0.7-mrad (7 X 10(-6) Gy) mean dose to the ovaries per image obtained. Sixteen patients demonstrated readily recognizable and documented abnormalities, corroborated by laparoscopy, laparotomy, or other supportive evidence. 相似文献
3.
4.
5.
6.
7.
Expression of cell-matrix molecules and integrin receptors in human liver grafts during chronic rejection 总被引:1,自引:0,他引:1
Ken Hoshino Bjorn Nashan Gustav Steinhoff Rudolf Pichlmayr K. Hoshino 《Transplant international》1994,7(S1):637-640
Abstract The inflammatory response of immune cells to target cells and cell-matrix molecules is regulated by several receptor-ligand molecules. As fibrosis develops in ongoing chronic rejection after liver transplantation, it is of interest to analyze patterns of integrin receptors and cell-matrix molecules in order to study the relation between immune cells and the stromal and parenchymal cells. In the present study, we demonstrated the expression of these molecules in chronic rejected human liver grafts using immunohistochemical techniques. The results showed a differential expression and induction of integrin receptors and cell-matrix molecules on resident liver cells, especially on sinusoids, reflecting a state of chronic inflammation and a specific interaction between integrin receptors and cell-matrix molecules. The patterns of induced integrin receptors on graft-infiltrating cells was closely related to the local production of cell-matrix molecules and reflected the final sequence of a stepwise progress of the inflammatory reaction. 相似文献
8.
Oxcarbazepine (OXC) is considered to be a promising new antiepileptic drug with similar efficacy and better tolerability compared to carbamazepine (CBZ). However, hyponatremia is supposed to occur even more often than with CBZ. We report on a patient who developed hyponatremic coma under OXC with a serum sodium level of 115 mmol/l, the second published case of OXC-induced hyponatremia with serious clinical adverse effects. 相似文献
9.
10.
Solitary bronchioloalveolar carcinoma: CT criteria 总被引:14,自引:0,他引:14
Kuhlman JE; Fishman EK; Kuhajda FP; Meziane MM; Khouri NF; Zerhouni EA; Siegelman SS 《Radiology》1988,167(2):379-382
The computed tomographic (CT) scans of 30 patients with solitary bronchioloalveolar carcinoma were reviewed. Common features at CT included the peripheral or subpleural location of a pulmonary mass (25 cases), pseudocavitation (18 cases), heterogeneous attenuation (17 cases), irregular margins forming a star pattern (22 cases), and pleural tags (21 cases). Using these CT criteria, four independent observers attempted to identify cases of bronchioloalveolar carcinoma from a larger sample of lung cancers and benign lesions by categorizing a series of test cases into four probability categories. Although the bronchioloalveolar carcinomas were correctly ranked in the two highest probability categories 75% of the time (in 45 of 60 cases), there was considerable overlap with other lung lesions, particularly with adenocarcinoma and large cell undifferentiated carcinoma. However, even though the typical features of bronchioloalveolar carcinoma are not invariable or highly specific, they are characteristic enough to suggest the diagnosis. 相似文献