全文获取类型
收费全文 | 6712篇 |
免费 | 388篇 |
国内免费 | 123篇 |
专业分类
耳鼻咽喉 | 137篇 |
儿科学 | 250篇 |
妇产科学 | 145篇 |
基础医学 | 688篇 |
口腔科学 | 236篇 |
临床医学 | 563篇 |
内科学 | 1345篇 |
皮肤病学 | 158篇 |
神经病学 | 428篇 |
特种医学 | 281篇 |
外国民族医学 | 2篇 |
外科学 | 1069篇 |
综合类 | 445篇 |
现状与发展 | 1篇 |
一般理论 | 1篇 |
预防医学 | 409篇 |
眼科学 | 139篇 |
药学 | 471篇 |
4篇 | |
中国医学 | 140篇 |
肿瘤学 | 311篇 |
出版年
2023年 | 53篇 |
2022年 | 137篇 |
2021年 | 199篇 |
2020年 | 139篇 |
2019年 | 182篇 |
2018年 | 214篇 |
2017年 | 201篇 |
2016年 | 217篇 |
2015年 | 229篇 |
2014年 | 320篇 |
2013年 | 398篇 |
2012年 | 391篇 |
2011年 | 349篇 |
2010年 | 213篇 |
2009年 | 180篇 |
2008年 | 248篇 |
2007年 | 293篇 |
2006年 | 255篇 |
2005年 | 275篇 |
2004年 | 382篇 |
2003年 | 417篇 |
2002年 | 324篇 |
2001年 | 288篇 |
2000年 | 214篇 |
1999年 | 155篇 |
1998年 | 78篇 |
1997年 | 63篇 |
1996年 | 44篇 |
1995年 | 32篇 |
1994年 | 24篇 |
1993年 | 25篇 |
1992年 | 79篇 |
1991年 | 47篇 |
1990年 | 38篇 |
1989年 | 54篇 |
1988年 | 54篇 |
1987年 | 47篇 |
1986年 | 53篇 |
1985年 | 42篇 |
1984年 | 27篇 |
1983年 | 21篇 |
1982年 | 14篇 |
1979年 | 16篇 |
1978年 | 14篇 |
1977年 | 13篇 |
1974年 | 13篇 |
1973年 | 11篇 |
1972年 | 15篇 |
1969年 | 19篇 |
1967年 | 15篇 |
排序方式: 共有7223条查询结果,搜索用时 0 毫秒
1.
Serum digoxin-like factor was detected in infants of diabetic mothers who were insulin-dependent or diet controlled. No statistical difference was found between the serum digoxin-like factor levels of the infants of diabetic mothers and the controls. 相似文献
2.
Yongquan Yin Wenpo Shan Xia Ji Xingyan Deng Jian’an Cheng Laimin Li 《Bulletin of environmental contamination and toxicology》2010,85(1):10-14
The levels and temporal variations of surface ozone at a coastal site in East China during summer and autumn were analyzed
and the influences of meteorological parameters on ozone were investigated. An inland city was chosen as a comparison site.
The main results and conclusions of this study are: (1) ozone pollution, with a maximum 1 h concentration of 150.98 ppbv,
was severe during summer and autumn at the coastal site; (2) the ozone level was obviously higher at the coastal site than
that at the inland site in September; (3) besides temperature and solar radiation, sea-land breeze circulation is an important
factor influencing the ozone level at the coastal site, and sea breeze often induce high ozone levels (the average ozone concentration
for sea breeze was about 13 ppbv higher than that for land breeze). 相似文献
3.
R. Bondì R. Padua L. Bondì A. Battaglia E. Romanini A. Campi 《Journal of orthopaedics and traumatology》2007,8(1):36-41
Abstract Calcaneal fracture is the most common of the tarsal fractures and represents 1%–2% of all fractures. The fractures may be
divided into extra-articular (not affecting the joint) and intra-articular (involving the talo-calcaneal and calcaneal cuboid
joints) types. The management of heel fractures includes nonoperative and operative treatments, but no clear consensus has
been reached. The choice of operative treatment is still controversial with many factors influencing the final clinical outcome.
Many studies have assessed the outcome of treatment of calcaneal fractures, but there is a general disagreement on their management.
The objective of this study was to collect and evaluate the scientific evidence reported in the literature supporting the
different treatments for calcaneal fractures. 相似文献
4.
29例非胰岛素依赖型糖尿病合并周围神经病变患者分成两组:一组为控制血糖组共12例,经8个月严格控制血糖,正中、尺、腓运动神经传导速度和正中、尺感觉神经潜伏期获改善,而且改善的程度与空腹血糖和糖基化血红蛋白降低的程度密切相关;另一组为针灸加控制血糖组共17例,经1与3个月的治疗,分别有82.4%和90.0%的患者神经病变临床症状得到改善,但正中、尺、腓运动神经传导速度和正中、尺感觉神经潜伏期未得到改善。 相似文献
5.
6.
Interferon for non-A, non-B chronic hepatitis. A meta-analysis of randomised clinical trials 总被引:2,自引:0,他引:2
We reviewed randomised clinical trials evaluating the effect of lymphoblastoid or recombinant alpha-interferon in non-A, non-B chronic hepatitis. The outcomes assessed were the rates of serum alanine aminotransferase normalization and relapse during and after stopping interferon. Data were pooled by meta-analysis and a 50% overall rate difference, favouring treated patients, was found. Results showed homogeneity in direction of treatment effect both after short-term (2-6 months, greater than or equal to 2 mega-units thrice weekly) and long-term (9-18 months, variable dose) interferon course. Moreover, results did not change when type of publication (abstracts vs. full reports) and treatment duration or schedule were accounted for. About 50% of patients originally responding to treatment relapsed within 6 months of either dose reduction or stopping interferon, thus suggesting that only in about one out of four patients is benefit from treatment sustained up to 1 year. We conclude that larger trials are needed to identify an optimal schedule of treatment and to evaluate predictors of interferon effectiveness in patients with non-A, non-B chronic hepatitis. 相似文献
7.
T. Aköz B. Erdoğan M. Görgü M. R. Kapucu O. Girgin 《European journal of plastic surgery》1998,21(6):308-310
Camptodactyly is a flexion deformity of the proximal interphalangeal joint. Because of unsatisfactory results, treatment is
not recommended for mild deformities, and in severe deformities surgery has been disappointing. A specially designed external
fixator providing gradual distraction was used in a severe case. With this mildly aggressive method, an acceptable result
was obtained.
Received: 5 June 1997/Accepted: 2 February 1998 相似文献
8.
9.
Matilde Valencia-Flores David N. Velázquez-Martínez Julían E. Villarreal 《Psychopharmacology》1990,102(1):136-144
The chronic exposure of rats to a schedule of operant water reinforcement coupled with chronically restricted access to water sensitized the animals to intermittentd-amphetamine injections (0.31–2.5 mg/kg with intervals of 12–23 days between any two injections) in such a way that this drug came to produce catastrophic losses of body weight (32.4% of control levels). In the sessions whend-amphetamine was administered, the rats were also given a total of 12 brief electric shocks. Loss of body weight was unaccompanied by parallel changes in operant behavior performance, or in food or water intake. Remarkably, in other studies with the same interventions (sham schedule sessions, water deprivation, and foot shocks), with the exception that reinforcers were never delivered,d-amphetamine did not produce catastrophic falls in body weight. This super-reactivity tod-amphetamine toxicity may be mediated by a possible stressor action of the schedule of reinforcement. Its mechanism might be analogous to the known sensitization produced by classical experimental stressor stimuli to the repeated administration ofd-amphetamine. 相似文献
10.
During the period from March to September 1989, 40 children suffering from primary nocturnal enuresis, aged between 5 and 14 years, were included in a study to assess the comparative therapeutical efficacy of DDAVP and acupuncture. Children were divided into four groups of 10: group A was treated with DDAVP, group B was treated with acupuncture, group C was treated with DDAVP and acupuncture and group D was treated with placebo (control). The trial design included 3 periods: observation (2 weeks), treatment (8 weeks) and follow-up (4 weeks). Nineteen children completed the study. The efficacy of treatment, which was expressed as a percentage of dry nights, was high in both the DDAVP and acupuncture groups, when used separately. The combined treatment of DDAVP and acupuncture appeared to be the most efficacious both in terms of the percentage of dry nights at the end of treatment and in relation to the stability of results, even after the end of the study. The paper gives a detailed analysis of correlations between type of treatment and urinary osmolarity. 相似文献