全文获取类型
收费全文 | 200131篇 |
免费 | 12801篇 |
国内免费 | 997篇 |
专业分类
耳鼻咽喉 | 2012篇 |
儿科学 | 4988篇 |
妇产科学 | 3913篇 |
基础医学 | 27071篇 |
口腔科学 | 4910篇 |
临床医学 | 19990篇 |
内科学 | 42857篇 |
皮肤病学 | 3625篇 |
神经病学 | 19437篇 |
特种医学 | 7707篇 |
外国民族医学 | 6篇 |
外科学 | 28755篇 |
综合类 | 2207篇 |
现状与发展 | 2篇 |
一般理论 | 181篇 |
预防医学 | 14476篇 |
眼科学 | 3947篇 |
药学 | 13704篇 |
3篇 | |
中国医学 | 301篇 |
肿瘤学 | 13837篇 |
出版年
2023年 | 1113篇 |
2022年 | 1837篇 |
2021年 | 3902篇 |
2020年 | 2634篇 |
2019年 | 3706篇 |
2018年 | 4507篇 |
2017年 | 3629篇 |
2016年 | 4186篇 |
2015年 | 4722篇 |
2014年 | 6627篇 |
2013年 | 9123篇 |
2012年 | 14003篇 |
2011年 | 14817篇 |
2010年 | 8522篇 |
2009年 | 8044篇 |
2008年 | 13213篇 |
2007年 | 14182篇 |
2006年 | 13291篇 |
2005年 | 13582篇 |
2004年 | 12740篇 |
2003年 | 12064篇 |
2002年 | 11283篇 |
2001年 | 1877篇 |
2000年 | 1438篇 |
1999年 | 2038篇 |
1998年 | 2631篇 |
1997年 | 2065篇 |
1996年 | 1800篇 |
1995年 | 1609篇 |
1994年 | 1422篇 |
1993年 | 1394篇 |
1992年 | 1002篇 |
1991年 | 998篇 |
1990年 | 809篇 |
1989年 | 805篇 |
1988年 | 748篇 |
1987年 | 731篇 |
1986年 | 679篇 |
1985年 | 740篇 |
1984年 | 817篇 |
1983年 | 722篇 |
1982年 | 946篇 |
1981年 | 856篇 |
1980年 | 738篇 |
1979年 | 472篇 |
1978年 | 497篇 |
1977年 | 532篇 |
1976年 | 434篇 |
1975年 | 400篇 |
1974年 | 329篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
21.
22.
23.
Peter Kielty 《The British journal of general practice》1983,33(256):744-745
24.
Peter d'Abbs 《Drug and alcohol review》1989,8(1):21-29
The “restricted areas” provisions of the Northern Territory Liquor Act constitute a preventative policy aimed at reducing the effects of alcohol abuse, particularly on Aboriginal communities. Under the provisions, communities can apply to be declared “dry” or semi-restricted with respect to liquor. Since their inception in 1979, the provisions have given rise to continuing controversy. This paper addresses some of the issues associated with the controversy. Patterns of alcohol consumption on “dry”, semi-restricted and unrestricted communities are compared, and the incidence of apprehension for public drunkenness before and after restricted area declarations is examined. The paper also discusses the provisions under which vehicles implicated in acts of illicit “grog-running” are forfeited to the NT Government. It is concluded that the restricted area provisions are associated with reduced levels of alcohol consumption and apprehensions for drunkenness, and are therefore beneficial in outcome. However, it is also argued that at present the provisions are flawed in that, while some aspects serve to promote community control over alcohol consumption, other elements have the effect of undermining community control and responsibility. 相似文献
25.
26.
Peter D. Le Roux David S. Jardine Paul M. Kanev John D. Loeser 《Child's nervous system》1991,7(1):34-39
We reviewed the results of all pediatric patients undergoing intracranial pressure (ICP) monitoring in a 2-year period at our institution. The outcome of patients suffering hypoxia or ischemic injuries (HII) is compared to those suffering non-hypoxic or non-ischemic injuries (NHII). Thirty-four patients had ICP monitors placed during the study period. Inconplete patient information led to the exclusion of 5 patients. An additional 5 patients were excluded because no measures to control ICP were taken after the monitor was placed. Twenty-four patients required treatment for raised ICP (hyperventilation, 24; mannitol, 19; barbiturate coma, 6). Admission Glasgow Coma Score in patients suffering HII (median score 5) and NHII (median score 6) were not significantly different (Mann-Whitney U Test). Only 2 of 8 patients with HII were near-drowning vietims. The remaining 6 had HII from other causes (5 survivors of various forms of asphyxia and 1 of cardiac arrest). All 8 patients had poor outcomes (1 severely disabled; 7 died). The 16 patients with NHII had a variety of diagnoses (6 trauma, 5 encephalitis, 4 bacterial meningitis, 1 diabetic ketoacidosis). Among these, 6 had good outcomes and 10 poor outcomes (2 severely disabled, 2 vegetative, and 6 died). The difference in outcome between patients with NHII and HII is significant at P=0.059 (Fischer Exact test). Patients with NHII may benefit from ICP monitoring. Patients with HII from near-drowning and other causes did not appear to benefit from ICP monitoring and interventions directed at controlling ICP. 相似文献
27.
28.
Williamson Kathleen A.; Hever Ann M.; Rainger Joe; Rogers R. Curtis; Magee Alex; Fiedler Zdenek; Keng Wee Teik; Sharkey Freddie H.; McGill Niolette; Hill Clare J.; Schneider Adele; Messina Mario; Turnpenny Peter D.; Fantes Judy A.; van Heyningen Veronica; FitzPatrick David R. 《Human molecular genetics》2006,15(12):2030
Table 1 相似文献
29.
30.
Thomas Heitz Peter Rohrbach Hartwig Hcker 《Macromolecular chemistry and physics.》1989,190(12):3295-3316
Liquid-crystalline main-chain polyesters with polystyrene side chains of different length and number per main chain were synthesized using aromatic hydroxyfunctional polystyrene (PS) macromonomers, terephthalic acid derivatives and tert-butylhydroquinone as co-diol. The molecular weight of the polystyrene side chain was varied in the range from 1000 to 20000. The influence of this novel type of substituent on the solubility, thermal behaviour and miscibility with PS as a flexible matrix polymer is discussed. The properties of the new compounds are compared to those of the respective homopolyester. The graft copolyesters are, depending on the characteristics of the polymeric substituent, soluble in common organic solvents and their thermal transition points are lowered compared to the homopolyester. Compared to blends of the homopolyester, the improvement of miscibility of the polymer-substituted rigid rods with PS as an example for a flexible matrix polymer can be valued as a step to molecular reinforcement. 相似文献