全文获取类型
收费全文 | 63647篇 |
免费 | 4285篇 |
国内免费 | 138篇 |
专业分类
耳鼻咽喉 | 511篇 |
儿科学 | 2433篇 |
妇产科学 | 2174篇 |
基础医学 | 7939篇 |
口腔科学 | 841篇 |
临床医学 | 10527篇 |
内科学 | 11298篇 |
皮肤病学 | 1005篇 |
神经病学 | 6059篇 |
特种医学 | 1133篇 |
外国民族医学 | 33篇 |
外科学 | 5293篇 |
综合类 | 750篇 |
现状与发展 | 1篇 |
一般理论 | 112篇 |
预防医学 | 9082篇 |
眼科学 | 726篇 |
药学 | 3568篇 |
1篇 | |
中国医学 | 100篇 |
肿瘤学 | 4484篇 |
出版年
2023年 | 437篇 |
2022年 | 597篇 |
2021年 | 1297篇 |
2020年 | 895篇 |
2019年 | 1397篇 |
2018年 | 1556篇 |
2017年 | 1153篇 |
2016年 | 1233篇 |
2015年 | 1360篇 |
2014年 | 1906篇 |
2013年 | 3127篇 |
2012年 | 4435篇 |
2011年 | 4705篇 |
2010年 | 2486篇 |
2009年 | 2329篇 |
2008年 | 4135篇 |
2007年 | 4577篇 |
2006年 | 4455篇 |
2005年 | 4359篇 |
2004年 | 4118篇 |
2003年 | 3906篇 |
2002年 | 3713篇 |
2001年 | 486篇 |
2000年 | 328篇 |
1999年 | 490篇 |
1998年 | 816篇 |
1997年 | 644篇 |
1996年 | 540篇 |
1995年 | 467篇 |
1994年 | 450篇 |
1993年 | 432篇 |
1992年 | 325篇 |
1991年 | 272篇 |
1990年 | 262篇 |
1989年 | 210篇 |
1988年 | 206篇 |
1987年 | 207篇 |
1986年 | 199篇 |
1985年 | 226篇 |
1984年 | 256篇 |
1983年 | 271篇 |
1982年 | 339篇 |
1981年 | 294篇 |
1980年 | 238篇 |
1979年 | 162篇 |
1978年 | 143篇 |
1977年 | 149篇 |
1976年 | 128篇 |
1975年 | 105篇 |
1974年 | 101篇 |
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
11.
12.
13.
14.
15.
16.
17.
PROBLEM: Recent developments in providing care to children with emotional and behavioral disorders, especially those with serious emotional disturbance, have included the establishment of systems of care. Guided by a set of principles and values, these systems of care have organized and delivered services to children and families with complex needs. To date, nurses have not had a salient role in systems of care. RESULTS: It is estimated that 20% of American children and adolescents have an emotional or mental disorder. As many as two thirds of these children are not receiving services. Systems of care have been funded to provide services for these children, particularly for the most severely affected. To date, nursing has not had a prominent role in these systems of care. CONCLUSIONS: Based on their knowledge, skills, and holistic approach to care, nurses could better integrate nursing care into systems of care. Possible roles as case managers, primary therapists, in-home interventionists, and in educational programs are suggested. 相似文献
18.
Sandra Urdaneta Hartmann Brian Wigdahl Elizabeth B Neely Cheston M Berlin Cara-Lynne Schengrund Hung-Mo Lin Mary K Howett 《Journal of human lactation》2006,22(1):61-74
Reduction of transmission of human immunodeficiency virus type 1 (HIV-1) through human milk is needed. Alkyl sulfates such as sodium dodecyl sulfate (SDS) are microbicidal against HIV-1 at low concentrations, have little to no toxicity, and are inexpensive. The authors have reported that treatment of HIV-1-infected human milk with < or = 1% (10 mg/mL) SDS for 10 minutes inactivates cell-free and cell-associated virus. The SDS can be removed with a commercially available resin after treatment without recovery of viral infectivity. In this article, the authors report results of selective biochemical analyses (ie, protein, immunoglobulins, lipids, cells, and electrolytes) of human milk subjected to SDS treatment and removal. The SDS treatment or removal had no significant effects on the milk components studied. Therefore, the use of alkyl sulfate microbicides to treat milk from HIV-1-positive women may be a simple, practical, and nutritionally sound way to prevent or reduce transmission of HIV-1 while still feeding with mother's own milk. 相似文献
19.
20.