全文获取类型
收费全文 | 3878篇 |
免费 | 300篇 |
国内免费 | 22篇 |
专业分类
耳鼻咽喉 | 22篇 |
儿科学 | 123篇 |
妇产科学 | 113篇 |
基础医学 | 393篇 |
口腔科学 | 51篇 |
临床医学 | 652篇 |
内科学 | 722篇 |
皮肤病学 | 55篇 |
神经病学 | 250篇 |
特种医学 | 244篇 |
外科学 | 542篇 |
综合类 | 88篇 |
一般理论 | 13篇 |
预防医学 | 400篇 |
眼科学 | 103篇 |
药学 | 255篇 |
中国医学 | 2篇 |
肿瘤学 | 172篇 |
出版年
2022年 | 29篇 |
2021年 | 71篇 |
2020年 | 45篇 |
2019年 | 72篇 |
2018年 | 63篇 |
2017年 | 55篇 |
2016年 | 64篇 |
2015年 | 76篇 |
2014年 | 84篇 |
2013年 | 148篇 |
2012年 | 152篇 |
2011年 | 193篇 |
2010年 | 112篇 |
2009年 | 109篇 |
2008年 | 163篇 |
2007年 | 201篇 |
2006年 | 177篇 |
2005年 | 208篇 |
2004年 | 141篇 |
2003年 | 156篇 |
2002年 | 124篇 |
2001年 | 111篇 |
2000年 | 104篇 |
1999年 | 102篇 |
1998年 | 78篇 |
1997年 | 84篇 |
1996年 | 48篇 |
1995年 | 52篇 |
1994年 | 46篇 |
1993年 | 44篇 |
1992年 | 88篇 |
1991年 | 78篇 |
1990年 | 80篇 |
1989年 | 83篇 |
1988年 | 78篇 |
1987年 | 67篇 |
1986年 | 50篇 |
1985年 | 66篇 |
1984年 | 41篇 |
1983年 | 40篇 |
1982年 | 23篇 |
1981年 | 23篇 |
1980年 | 27篇 |
1979年 | 36篇 |
1978年 | 24篇 |
1977年 | 24篇 |
1976年 | 24篇 |
1975年 | 24篇 |
1974年 | 24篇 |
1973年 | 25篇 |
排序方式: 共有4200条查询结果,搜索用时 0 毫秒
21.
Emergency airway management in patients with cervical spine injuries 总被引:10,自引:0,他引:10
22.
23.
Mary L. Nolan MA BA RGN 《Journal of advanced nursing》1997,25(6):1198-1204
The history of antenatal education throws light on why contemporary class attenders represent only a particular section of the childbearing population. Since Victorian times, the non-availability of the women's network to middle class women has forced them to seek knowledge of their own bodies, confidence in their childbearing capacities and the support of other women through formal educational opportunities. Research suggests that antenatal classes often fail to provide women with a realistic account of birth and parenting to replace the lived experience of earlier decades and may not be facilitated in such a way as to create the support groups which class attenders critically need. Teaching approaches often promote dependency amongst clients rather than nurturing the decision-making skills required by a consumer-driven maternity service. 相似文献
24.
Abdominal complications of intestinal surgery are an important cause of postoperative morbidity and mortality. We define early complications as those occurring within the first 30 days after surgery. The radiological contribution towards prompt and accurate diagnosis of common complications is discussed and the radiologist's role in non-operative management is outlined. 相似文献
25.
26.
27.
28.
Development of a molecular-beacon assay to detect the G1896A precore mutation in hepatitis B virus-infected individuals 总被引:1,自引:0,他引:1
Waltz TL Marras S Rochford G Nolan J Lee E Melegari M Pollack H 《Journal of clinical microbiology》2005,43(1):254-258
The 1896 precore (PC) mutation is the most frequent cause of hepatitis B virus e-antigen (HBeAg)-negative chronic hepatitis B virus (HBV) infection. Detection of the 1896 PC mutation has application in studies monitoring antiviral therapy and the natural history of the disease. Identification of this mutation is usually performed by direct sequencing, which is both costly and laborious. The aim of this study was to develop a rapid, high-throughput assay to detect the 1896 PC mutation using real-time PCR and molecular-beacon technology. The assay was initially standardized on oligonucleotide targets and plasmids containing the wild-type (WT) and PC mutation and then tested on plasma samples from children with HBV DNA of >10(6) copies/ml. Nine individuals were HBeAg negative and suspected to harbor HBeAg mutations, while 12 children were HBeAg positive and selected as controls. Ninety percent (19 of 21) of plasma samples tested with molecular beacons were in complete agreement with sequencing results. The remaining 10% (2 of 21) of samples were identified as heterogeneous mixtures of WT and mutant virus by molecular beacons, though sequencing found only a homogeneous mutant in both cases. Overall, the 1896 PC mutation was detected by this assay in 55.5% of the children with HBeAg-negative infection. In summary, this assay is a rapid, sensitive, and specific technique that effectively discriminates WT from 1896 PC mutant HBV and may be useful in clinical and epidemiological studies. 相似文献
29.
30.