全文获取类型
收费全文 | 19572篇 |
免费 | 1533篇 |
国内免费 | 575篇 |
学科分类
医药卫生 | 21680篇 |
出版年
2024年 | 35篇 |
2023年 | 227篇 |
2022年 | 461篇 |
2021年 | 693篇 |
2020年 | 454篇 |
2019年 | 493篇 |
2018年 | 570篇 |
2017年 | 504篇 |
2016年 | 496篇 |
2015年 | 667篇 |
2014年 | 810篇 |
2013年 | 928篇 |
2012年 | 1402篇 |
2011年 | 1498篇 |
2010年 | 890篇 |
2009年 | 721篇 |
2008年 | 1095篇 |
2007年 | 1102篇 |
2006年 | 1146篇 |
2005年 | 1122篇 |
2004年 | 930篇 |
2003年 | 799篇 |
2002年 | 774篇 |
2001年 | 538篇 |
2000年 | 530篇 |
1999年 | 481篇 |
1998年 | 187篇 |
1997年 | 193篇 |
1996年 | 159篇 |
1995年 | 113篇 |
1994年 | 111篇 |
1993年 | 76篇 |
1992年 | 206篇 |
1991年 | 188篇 |
1990年 | 165篇 |
1989年 | 146篇 |
1988年 | 117篇 |
1987年 | 112篇 |
1986年 | 91篇 |
1985年 | 62篇 |
1984年 | 43篇 |
1983年 | 31篇 |
1982年 | 45篇 |
1981年 | 39篇 |
1980年 | 35篇 |
1979年 | 36篇 |
1978年 | 32篇 |
1977年 | 19篇 |
1975年 | 20篇 |
1973年 | 14篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
1.
Haochu Li Xiaoming Li Lai Sze Tso Shan Qiao Eleanor Holroyd Yuejiao Zhou 《Vulnerable children and youth studies》2016,11(2):173-179
In HIV/AIDS research, few studies to date have evaluated ways to improve parental HIV disclosure practices using feedback from HIV-negative children who have recently experienced this event. We conducted semi-structured in-depth interviews with 20 children (aged 6–15) who were partially to fully aware of their parents’ HIV status in rural Guangxi, China. Of the 20 children, eight children who were of older age (11.38 years in average) endorsed parental HIV disclosure, five discouraged it and seven expressed uncertainty. Children’s different experiences and attitudes towards disclosure were seen to be associated with their family dynamics (especially the parent–child relationship), social support and care, experiences of stigma and discrimination, psychosocial suffering, comprehension of the disease and the children’s age. Our study contributes to building a child-centered comprehensive understanding for Chinese parental HIV disclosure. It is imperative that counselors and community advocates assess and help parents achieve optimal readiness preceding disclosure of their illness to their HIV-negative children. 相似文献
2.
PNPLA3 gene polymorphism and response to lifestyle modification in patients with nonalcoholic fatty liver disease 下载免费PDF全文
3.
4.
5.
赖雷成 《福建中医学院学报》1992,(2)
“搓滚舒筋”练功疗法,是一种以竹筒为简易器械的脚底搓滚练功治疗“筋挛缩”症的方法。最早文献见于马王堆汉墓出土的帛书《五十二病方》,起码有两干多年的渊源。骨伤科常用之,内、外诸科亦有用之。这一传统疗法,筒、便、廉、验,值得弘扬。 相似文献
6.
New thermo-responsive, pH-responsive, and biodegradable nanoparticles comprised of poly(D,L-lactide)-graft-poly(N-isopropyl acrylamide-co-methacrylic acid) (PLA-g-P(NIPAm-co-MAA)) were developed by grafting biodegradable poly(D,L-lactide) onto N-isopropyl acrylamide and methacrylic acid. A core-shell type nano-structure was formed with a hydrophilic outer shell and a hydrophobic inner core, which exhibited a phase transition temperature above 37 degrees C suitable for biomedical application. Upon heating above the phase transition temperature, PLA-g-P(NIPAm-co-MAA) nanoparticle showed a polarity increase of pyrene in either buffer solution or intra-hepato-carcinoma cells as determined by fluorescence measurement, indicating that the structure of nanoparticles caused leakages from outer shell copolymers aggregation and collapsed. The drug loading level of 5-fluorouracil (5-FU) encapsulated in the PLA-g-P(NIPAm-co-MAA) nanoparticles can be as high as 20%. The release of 5-FU from nanoparticles was strongly controlled by the pH in the aqueous solution. Based on these results, PLA-g-P(NIPAm-co-MAA) nanoparticles can be used as a drug carrier for intracellular delivery of anti-cancer drug. 相似文献
7.
8.
9.
10.
Carcinoma arising from an epiphrenic diverticulum: a frequently misdiagnosed disease. 总被引:1,自引:0,他引:1
Epiphrenic diverticulum is rare, comprising of about 10% of all esophageal diverticula. Carcinoma arising within such a diverticulum is even less common. We report on two patients with squamous cell carcinoma arising from an epiphrenic diverticulum. Some features of malignant change related to the epiphrenic diverticula were misdiagnosed or missed in our cases and other reports due to lack of clinical experience. It is important to exclude the possibility of malignancy as this is vital for surgical planning. Although the prognosis for patients with malignancy arising from an epiphrenic diverticulum is generally poor, a high index of suspicion may increase the chance of cure. 相似文献