全文获取类型
收费全文 | 1791篇 |
免费 | 147篇 |
国内免费 | 11篇 |
专业分类
耳鼻咽喉 | 1篇 |
儿科学 | 126篇 |
妇产科学 | 23篇 |
基础医学 | 174篇 |
口腔科学 | 113篇 |
临床医学 | 237篇 |
内科学 | 337篇 |
皮肤病学 | 19篇 |
神经病学 | 117篇 |
特种医学 | 248篇 |
外科学 | 179篇 |
综合类 | 45篇 |
一般理论 | 2篇 |
预防医学 | 115篇 |
眼科学 | 18篇 |
药学 | 84篇 |
1篇 | |
肿瘤学 | 110篇 |
出版年
2019年 | 12篇 |
2018年 | 17篇 |
2017年 | 22篇 |
2016年 | 26篇 |
2015年 | 31篇 |
2014年 | 29篇 |
2013年 | 41篇 |
2012年 | 41篇 |
2011年 | 49篇 |
2010年 | 48篇 |
2009年 | 69篇 |
2008年 | 48篇 |
2007年 | 39篇 |
2006年 | 48篇 |
2005年 | 49篇 |
2004年 | 34篇 |
2003年 | 47篇 |
2002年 | 48篇 |
2001年 | 38篇 |
2000年 | 31篇 |
1999年 | 33篇 |
1998年 | 95篇 |
1997年 | 93篇 |
1996年 | 93篇 |
1995年 | 66篇 |
1994年 | 60篇 |
1993年 | 53篇 |
1992年 | 36篇 |
1991年 | 39篇 |
1990年 | 23篇 |
1989年 | 52篇 |
1988年 | 48篇 |
1987年 | 51篇 |
1986年 | 36篇 |
1985年 | 46篇 |
1984年 | 31篇 |
1983年 | 31篇 |
1982年 | 23篇 |
1981年 | 25篇 |
1980年 | 18篇 |
1979年 | 22篇 |
1978年 | 16篇 |
1977年 | 16篇 |
1976年 | 16篇 |
1975年 | 18篇 |
1973年 | 19篇 |
1971年 | 15篇 |
1970年 | 10篇 |
1969年 | 10篇 |
1967年 | 9篇 |
排序方式: 共有1949条查询结果,搜索用时 46 毫秒
1.
PJ Commerford 《Cardiovascular journal of Africa》2015,26(4):151-Aug;26(4):151
2.
Hans Bosma Martin PJ van Boxtel Gertrudis IJM Kempen Jacques ThM van Eijk Jelle Jolles 《BMC public health》2007,7(1):179
Background
The aims of this study were to examine the extent to which higher intellectual abilities protect higher socio-economic groups from functional decline and to examine whether the contribution of intellectual abilities is independent of childhood deprivation and low birth weight and other socio-economic and developmental factors in early life. 相似文献3.
A human phase-response curve to light. 总被引:12,自引:0,他引:12
Using 'classical' experimental protocols, a human phase-response curve (PRC) to a single 3-h bright light pulse has been established. When the light pulse was centred slightly before the time of body temperature minimum, the circadian system delayed, whilst a pulse slightly after the minimum advanced it. Maximum phase shifts were about 2 h. When light pulses over 3 successive cycles were used, larger shifts (4-7 h) were produced. It is concluded that the human PRC does not differ in principle from that found in other species, except with respect to the light intensity required. 相似文献
4.
D J Bergin C D McCord T Berger H Friedberg W Waterhouse 《The British journal of ophthalmology》1988,72(11):863-867
Blepharochalasis is an uncommon disorder distinguished by recurrent episodes of eyelid oedema in young patients. A hypertrophic form, manifested as fat herniation, and an atrophic form, manifested as fat atrophy, have been described. Ptosis with excellent levator function, laxity of the lateral canthal structures with rounding of the lateral canthal angle, nasal fat pad atrophy, and redundant eyelid skin develop after many episodes of eyelid swelling. Fine wrinkling, atrophy, and telangiectasias characterise the excess eyelid skin. We describe four cases of this syndrome in which external levator aponeurosis tuck, blepharoplasty, lateral canthoplasty, and dermis fat grafts were used to correct atrophic blepharochalasis after the syndrome had run its course. 相似文献
5.
6.
7.
8.
Previous reports in the literature have described correlation of increasing repeat length with severity of the phenotype, in Kennedy syndrome. We describe male siblings with different repeat lengths, with lack of expression of the phenotype in the sibling with the longer repeat length. The phenotype was identical to motor neurone disease. There is variability of expression in Kennedy syndrome and repeat length even in siblings cannot be taken as a conclusive indicator of severity. CAG repeat length cannot be used to predict the natural history of Kennedy disease. The diagnosis of Kennedy syndrome should be considered in male patients presenting with atypical motor neurone disease. 相似文献
9.
PJ Woll PhD MRCP R Pettengell PhD FRACP 《International journal of clinical practice》1997,51(2):111-115
SUMMARY The interferons are natural glycoproteins secreted in response to various stimuli, including viral infection. They have antiviral, antiproliferative and immunomodulatory effects on different target cell populations. Since recombinant human interferons have become available, they have been tested in a wide range of malignancies. They are well established in the treatment of hairy cell leukaemia, chronic myelogenous leukaemia and multiple myeloma. Although they have documented activity against lymphoma, melanoma, renal cell cancer and carcinoid tumours, their role in the treatment of these tumours is less clear. In the common solid tumours, such as lung cancer and colorectal cancer, the use of interferons remains experimental. Here we will summarise their practice applications in oncology, using randomised studies where available to establish their place in multi-modality treatment. We will not discuss their use as antiviral or immunomodulating agents in viral and autoimmune diseases, multiple sclerosis or after organ transplantation. 相似文献
10.