全文获取类型
收费全文 | 262023篇 |
免费 | 36885篇 |
国内免费 | 3029篇 |
专业分类
耳鼻咽喉 | 6181篇 |
儿科学 | 9083篇 |
妇产科学 | 5010篇 |
基础医学 | 19448篇 |
口腔科学 | 5492篇 |
临床医学 | 36855篇 |
内科学 | 71700篇 |
皮肤病学 | 9930篇 |
神经病学 | 25643篇 |
特种医学 | 8845篇 |
外国民族医学 | 1篇 |
外科学 | 50340篇 |
综合类 | 723篇 |
现状与发展 | 72篇 |
一般理论 | 59篇 |
预防医学 | 18769篇 |
眼科学 | 5109篇 |
药学 | 8695篇 |
中国医学 | 442篇 |
肿瘤学 | 19540篇 |
出版年
2024年 | 788篇 |
2023年 | 5679篇 |
2022年 | 3406篇 |
2021年 | 6782篇 |
2020年 | 8186篇 |
2019年 | 5290篇 |
2018年 | 10829篇 |
2017年 | 9873篇 |
2016年 | 11410篇 |
2015年 | 11746篇 |
2014年 | 19889篇 |
2013年 | 21554篇 |
2012年 | 14719篇 |
2011年 | 15152篇 |
2010年 | 15444篇 |
2009年 | 18418篇 |
2008年 | 13560篇 |
2007年 | 11836篇 |
2006年 | 13678篇 |
2005年 | 10552篇 |
2004年 | 9138篇 |
2003年 | 7469篇 |
2002年 | 7003篇 |
2001年 | 4309篇 |
2000年 | 3375篇 |
1999年 | 3817篇 |
1998年 | 4477篇 |
1997年 | 4135篇 |
1996年 | 3923篇 |
1995年 | 3702篇 |
1994年 | 2403篇 |
1993年 | 1945篇 |
1992年 | 1675篇 |
1991年 | 1619篇 |
1990年 | 1265篇 |
1989年 | 1382篇 |
1988年 | 1197篇 |
1987年 | 1011篇 |
1986年 | 1054篇 |
1985年 | 846篇 |
1984年 | 699篇 |
1983年 | 688篇 |
1982年 | 714篇 |
1981年 | 557篇 |
1980年 | 518篇 |
1979年 | 389篇 |
1978年 | 427篇 |
1977年 | 485篇 |
1975年 | 330篇 |
1972年 | 343篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
91.
92.
93.
Although lesions of the pterygopalatine space are uncommon, there are instances in which this relatively inaccessible region must be entered for biopsy or excision of masses. Traditional open approaches to the pterygopalatine space, involving external or intraoral incisions, provide limited visualization and carry associated morbidities. The evolution and advancement of endoscopic sinus surgical technique in recent years has led to its application to anatomic areas outside the strict limits of the sinonasal cavities. Such minimally invasive approaches are safe, effective, and spare unnecessary discomfort to the patient. This article describes the authors' method for performing an endoscopic approach to the pterygopalatine space. 相似文献
94.
95.
Michael Rosenzweig Martha Skinner Tatiana Prokaeva Roger Théberge Catherine Costello Brian M Drachman Lawreen H Connors 《Amyloid》2007,14(1):65-71
We report the identification of a new transthyretin (TTR) gene mutation and variant protein, Glu61Gly, in a 55-year-old man with progressive cardiomyopathy, mild peripheral neuropathy and bilateral carpal tunnel syndrome. A diagnosis of TTR-associated familial amyloidosis (ATTR) was considered after an endomyocardial biopsy revealed amyloid deposits in the heart of a patient who had no family history of amyloidosis and no evidence of a plasma cell dyscrasia. Serum screening for a TTR variant by isoelectric focusing (IEF) was positive and prompted further studies to identify the genetic abnormality and to characterize the amyloidogenic protein. Direct DNA sequence analysis of all four coding regions in the TTR gene demonstrated heterozygosity in exon 3. Near equal amounts of guanine (G) and adenine (A) were observed at the second base position of codon 61. The wild-type (GAG) and mutated (GGG) sequences found in codon 61 correspond to glutamic acid (Glu) and glycine (Gly) residues, amino acids which differ in mass by -72 Da. Mass spectrometric analyses of TTR immunoprecipitated from serum showed the presence of both wild-type and variant proteins. The observed mass results for the wild-type and variant proteins were consistent with the predicted values calculated from the genetic analysis data. 相似文献
96.
97.
98.
Pressure ulcers are a high-risk, high-volume, and high-cost problem for persons with disabilities. This article describes four tools published in the literature and reports the validity, reliability, strengths, and limitations of each. These tools include the Pressure Ulcer Scale for Healing (PUSH), the Pressure Sore Status Tool (PSST), the Sussman Wound Healing Tool (SWHT), and the Sessing Scale. Rehabilitation nurses should use a consistent framework with accurate quantification to assess, document, and monitor changes in pressure ulcers over time. Such a measurement tool must prove valid for the disabled population in which the tool is used. This will enable healthcare providers to communicate more effectively and evaluate the therapeutic plan of care. 相似文献
99.
100.