全文获取类型
收费全文 | 65788篇 |
免费 | 1465篇 |
国内免费 | 531篇 |
专业分类
耳鼻咽喉 | 711篇 |
儿科学 | 3061篇 |
妇产科学 | 1839篇 |
基础医学 | 8794篇 |
口腔科学 | 825篇 |
临床医学 | 4466篇 |
内科学 | 10504篇 |
皮肤病学 | 1229篇 |
神经病学 | 5003篇 |
特种医学 | 5068篇 |
外科学 | 11173篇 |
综合类 | 1071篇 |
一般理论 | 1篇 |
预防医学 | 4870篇 |
眼科学 | 1097篇 |
药学 | 3533篇 |
1篇 | |
中国医学 | 735篇 |
肿瘤学 | 3803篇 |
出版年
2023年 | 63篇 |
2022年 | 171篇 |
2021年 | 235篇 |
2020年 | 146篇 |
2019年 | 193篇 |
2018年 | 3755篇 |
2017年 | 4231篇 |
2016年 | 2573篇 |
2015年 | 1427篇 |
2014年 | 1312篇 |
2013年 | 1308篇 |
2012年 | 4745篇 |
2011年 | 2431篇 |
2010年 | 723篇 |
2009年 | 774篇 |
2008年 | 1180篇 |
2007年 | 1189篇 |
2006年 | 1373篇 |
2005年 | 10651篇 |
2004年 | 14567篇 |
2003年 | 9281篇 |
2002年 | 1592篇 |
2001年 | 550篇 |
2000年 | 351篇 |
1999年 | 364篇 |
1998年 | 295篇 |
1997年 | 169篇 |
1996年 | 221篇 |
1995年 | 178篇 |
1994年 | 129篇 |
1993年 | 153篇 |
1992年 | 152篇 |
1991年 | 137篇 |
1990年 | 103篇 |
1989年 | 96篇 |
1988年 | 90篇 |
1987年 | 83篇 |
1986年 | 87篇 |
1985年 | 78篇 |
1984年 | 55篇 |
1983年 | 61篇 |
1982年 | 71篇 |
1981年 | 63篇 |
1980年 | 47篇 |
1979年 | 27篇 |
1978年 | 33篇 |
1977年 | 22篇 |
1975年 | 19篇 |
1974年 | 21篇 |
1972年 | 18篇 |
排序方式: 共有10000条查询结果,搜索用时 31 毫秒
51.
52.
53.
Steven Z George Mark D Bishop Joel E Bialosky Giorgio Zeppieri Michael E Robinson 《BMC musculoskeletal disorders》2006,7(1):68
Background
The underlying causes of spinal manipulation hypoalgesia are largely unknown. The beneficial clinical effects were originally theorized to be due to biomechanical changes, but recent research has suggested spinal manipulation may have a direct neurophysiological effect on pain perception through dorsal horn inhibition. This study added to this literature by investigating whether spinal manipulation hypoalgesia was: a) local to anatomical areas innervated by the lumbar spine; b) correlated with psychological variables; c) greater than hypoalgesia from physical activity; and d) different for A-delta and C-fiber mediated pain perception. 相似文献54.
55.
In human Y-79 retinoblastoma cells corticotropin-releasing hormone (CRH) produces a marked and rapid increase of adenylate cyclase activity. The concentration of the peptide producing half-maximal stimulation is 60 nM. The effect of CRH is significantly antagonized by the specific CRH receptor antagonist alpha-helical CHR 9-41 and is mimicked by sauvagine and urotensin I, two peptides displaying sequence homology with CRH. These results demonstrate the presence of functional CRH receptors in human Y-79 retinoblastoma cells and suggest that this cell line may be a suitable model in which to study the action of CRH on human retinal cell function. 相似文献
56.
本文在分析黑龙江省妇幼保健机构设置现状的基础上,论述了在社会主义市场经济新形势下,妇幼保健机构发展的指导思想、模式与对策。 相似文献
57.
58.
59.
60.
Ernesto Pasquini Vittorio Sciarretta Giorgio Frank Cosetta Cantaroni Giovanni Carlo Modugno Diego Mazzatenta Giovanni Farneti 《Otolaryngology--head and neck surgery》2004,131(3):180-186
OBJECTIVE: The endoscopic approach can be successfully employed for the treatment of benign tumors such as fibroosseus and vascular lesions, pleomorphic adenomas, gliomas, and schwannomas. STUDY DESIGN AND SETTING: Nineteen patients diagnosed with benign tumors of the nasal cavity and paranasal sinuses and treated using an endoscopic approach were retrospectively reviewed. The endoscopic approach was used exclusively in 15 cases and was associated with an external approach in 4 cases (due to an intracranial extension of the tumor in 3 patients and its location at the level of the anterior wall of the frontal sinus in the last case). RESULTS: The resection of the lesions was radical in 18 patients and subtotal in 1 case. The mean follow-up was 27 months and only 1 recurrence (5%) was observed in the juvenile angiofibroma group 20 months postoperatively. CONCLUSION: and significance In selected cases, endoscopic surgery can be considered an effective treatment for the resection of benign tumors involving the sinonasal tract. 相似文献