全文获取类型
收费全文 | 2895篇 |
免费 | 244篇 |
国内免费 | 42篇 |
专业分类
耳鼻咽喉 | 18篇 |
儿科学 | 99篇 |
妇产科学 | 41篇 |
基础医学 | 335篇 |
口腔科学 | 76篇 |
临床医学 | 275篇 |
内科学 | 619篇 |
皮肤病学 | 38篇 |
神经病学 | 270篇 |
特种医学 | 291篇 |
外科学 | 272篇 |
综合类 | 54篇 |
一般理论 | 3篇 |
预防医学 | 340篇 |
眼科学 | 23篇 |
药学 | 173篇 |
中国医学 | 4篇 |
肿瘤学 | 250篇 |
出版年
2021年 | 21篇 |
2020年 | 18篇 |
2019年 | 30篇 |
2018年 | 30篇 |
2017年 | 32篇 |
2016年 | 31篇 |
2015年 | 49篇 |
2014年 | 80篇 |
2013年 | 90篇 |
2012年 | 120篇 |
2011年 | 127篇 |
2010年 | 91篇 |
2009年 | 80篇 |
2008年 | 125篇 |
2007年 | 164篇 |
2006年 | 117篇 |
2005年 | 101篇 |
2004年 | 91篇 |
2003年 | 63篇 |
2002年 | 105篇 |
2001年 | 80篇 |
2000年 | 83篇 |
1999年 | 96篇 |
1998年 | 65篇 |
1997年 | 57篇 |
1996年 | 72篇 |
1995年 | 64篇 |
1994年 | 63篇 |
1993年 | 44篇 |
1992年 | 62篇 |
1991年 | 47篇 |
1990年 | 67篇 |
1989年 | 82篇 |
1988年 | 74篇 |
1987年 | 68篇 |
1986年 | 60篇 |
1985年 | 59篇 |
1984年 | 45篇 |
1983年 | 35篇 |
1982年 | 33篇 |
1981年 | 22篇 |
1980年 | 31篇 |
1979年 | 28篇 |
1978年 | 26篇 |
1977年 | 26篇 |
1976年 | 24篇 |
1975年 | 16篇 |
1974年 | 26篇 |
1973年 | 16篇 |
1969年 | 15篇 |
排序方式: 共有3181条查询结果,搜索用时 15 毫秒
1.
Prostatitis accounts for almost 2 million office visits to urologists and primary care physicians. The label “prostatitis” refers to a diverse constellation of symptoms and disease processes. The diagnosis and treatment of this disorder present numerous challenges for the physician, including a lack of abnormal findings on physical examination, laboratory tests, and radiographic images. In this article, we offer a review of the current literature and recommendations for the evaluation and diagnosis of the patient presenting with prostatitis. 相似文献
2.
3.
4.
SUMMARY A case congenital dislocation of both knees and dislocation of the left hip in an infant whose mother had a chronic amniotic fluid leakage after mid-trimester amniocentesis. 相似文献
5.
MD Charles D. Hummer III MD PhD Richard H. Rothman MD William J. Hozack 《The Journal of arthroplasty》1995,10(6)
Catastrophic failure of two zirconia—ceramic modular femoral heads occurred, despite the theoretical improved toughness of zirconia—ceramic relative to alumina—ceramic. This experience led the authors to return to cobalt—chromium as the metal of choice for articulation against polyethylene in total hip arthroplasty. 相似文献
6.
7.
Localized 1H NMR spectra of glutamate in the human brain. 总被引:2,自引:0,他引:2
D L Rothman C C Hanstock O A Petroff E J Novotny J W Prichard R G Shulman 《Magnetic resonance in medicine》1992,25(1):94-106
Localized 1H NMR spectra at TE = 12 ms were obtained from cerebral cortex of human subjects using ISIS with surface suppression. The 2.29-ppm resonance was assigned to C4 glutamate with contributions from C4 glutamine and GABA using in vivo spectral editing and comparison of chemical shift with pure compounds. The measured intensity ratio between the 2.29 resonance and the creatine resonance at 3.03 ppm was in good agreement with the ratio predicted from previously reported measurements of glutamate, glutamine, and GABA concentrations in biopsied human brain tissue. 相似文献
8.
高效液相色谱法测定右旋儿茶素血浆浓度及药代动力学参数 总被引:1,自引:0,他引:1
本文建立了体液中右旋儿茶素的RP-HPLC测定方法。采用C_(18)键合相硅胶为填料的固相提取柱进行样品预处理,右旋儿茶素的提取回收率为79.8%.应用二极管阵列检测器对色谱峰纯度进行鉴定。该法精密度好,方法回收率近100%,日内、日间的变异系数为2.4~5.6%,血浓69.6~1160 ng/ml范围内呈线性关系,r=0.9993。家兔静注右旋儿茶素18mg/kg,其药代动力学过程符合二室模型,分布相半衰期为0.129 h,消除相半衰期为1.19h。 相似文献
9.
Robert A. Schnoll Ph.D. James Calvin B.A. Michael Malstrom B.S. Randi L. Rothman B.A. Hao Wang M.S. James Babb Ph.D. Suzanne M. Miller Ph.D. John A. Ridge M.D. Ph.D. Benjamin Movsas M.D. Corey Langer M.D. Michael Unger M.D. Melvyn Goldberg M.D. 《Annals of behavioral medicine》2003,25(3):214-221
Even though continued smoking by cancer patients adversely affects survival and quality of life, about one third of patients
who smoked prior to their diagnosis continue to smoke after their diagnosis. The implementation of smoking cessation treatments
for cancer patients has been slowed by the lack of data on correlates of tobacco use in this population. Thus, this longitudinal
study assessed demographic, medical, addiction, and psychological predictors of tobacco use among 74 head, neck, and lung
cancer patients. Multivariable binary logistic regression analyses, with outcome categorized as smoker or nonsmoker, indicated
that the likelihoodthat patients would be a smoker was associated with lower levels of perceived risk and a higher level of
quitting cons. Multivariable nominal logistic regression, with outcome classified as continuous smoker, continuous quitter,
relapser, or follow-up quitter, indicated that: (a) patients categorized as continuous smokers reported significantly lower
quitting self-efficacy than follow-up quitters and continuous quitters, (b) relapsers reported a significantly lower level
of quitting self-efficacy than either follow-up quitters or continuous quitters, and (c) continuous smokers exhibited a significantly
lower level of risk perceptions than continuous abstainers. These findings can be useful for the development and evaluation
of treatments to promote smoking cessation among cancer patients.
Support for this study was provided by National Institutes of Health Grants CA57708, CA06927, CA88610, CA95678, and CA76644. 相似文献
10.