全文获取类型
收费全文 | 136212篇 |
免费 | 9449篇 |
国内免费 | 631篇 |
专业分类
耳鼻咽喉 | 1656篇 |
儿科学 | 3428篇 |
妇产科学 | 2446篇 |
基础医学 | 17416篇 |
口腔科学 | 2904篇 |
临床医学 | 13321篇 |
内科学 | 28033篇 |
皮肤病学 | 1751篇 |
神经病学 | 11952篇 |
特种医学 | 5400篇 |
外科学 | 21861篇 |
综合类 | 1920篇 |
现状与发展 | 1篇 |
一般理论 | 173篇 |
预防医学 | 12429篇 |
眼科学 | 2916篇 |
药学 | 9627篇 |
2篇 | |
中国医学 | 179篇 |
肿瘤学 | 8877篇 |
出版年
2023年 | 673篇 |
2022年 | 1049篇 |
2021年 | 2574篇 |
2020年 | 1469篇 |
2019年 | 2401篇 |
2018年 | 2929篇 |
2017年 | 2118篇 |
2016年 | 2233篇 |
2015年 | 2716篇 |
2014年 | 4023篇 |
2013年 | 6066篇 |
2012年 | 8881篇 |
2011年 | 9451篇 |
2010年 | 5260篇 |
2009年 | 4816篇 |
2008年 | 8397篇 |
2007年 | 9004篇 |
2006年 | 8573篇 |
2005年 | 8727篇 |
2004年 | 8384篇 |
2003年 | 7882篇 |
2002年 | 7688篇 |
2001年 | 1292篇 |
2000年 | 1062篇 |
1999年 | 1402篇 |
1998年 | 1633篇 |
1997年 | 1308篇 |
1996年 | 1257篇 |
1995年 | 1223篇 |
1994年 | 1031篇 |
1993年 | 1009篇 |
1992年 | 843篇 |
1991年 | 868篇 |
1990年 | 754篇 |
1989年 | 735篇 |
1988年 | 757篇 |
1987年 | 740篇 |
1986年 | 761篇 |
1985年 | 842篇 |
1984年 | 907篇 |
1983年 | 867篇 |
1982年 | 1133篇 |
1981年 | 1156篇 |
1980年 | 964篇 |
1979年 | 631篇 |
1978年 | 668篇 |
1977年 | 597篇 |
1976年 | 519篇 |
1975年 | 468篇 |
1974年 | 471篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
71.
G. Bradley Schaefer James N. Thompson John B. Bodensteiner James M. McConnell William J. Kimberling Charles T. Gay William D. Dutton David C. Hutchings Stanton B. Gray 《Annals of neurology》1996,39(3):382-385
There are conflicting reports on the relationship between cerebellar vermal lobule hypoplasia and autism. Using quantitative magnetic resonance image analysis, we measured the cerebellar vermis in 125 normal individuals with a broad age range and 102 patients with a variety of neurogenetic abnormalities. We conclude that hypoplasia of cerebellar vermal lobules VI and VII is a nonspecific finding that even occurs in several conditions without autistic behavior. This suggests that it is not a specific neuroanatomical marker for autism, nor is cerebellar dys- genesis likely to be solely responsible for clinical autistic behaviors. 相似文献
72.
Ray Walker M.D. Debra Minor-Schork R.N. M.S.N. Richard Bloch Ph.D. James Esinhart Ph.D. 《The Psychiatric quarterly》1996,67(3):235-243
Objective. 1. To identify risk factors associated with psychiatric rehospitalization within six months, using global clinical assessments and demographic information and; 2. To determine if risk factors for a hospital in a rural region are similar to those reported for urban hospitals. Method. The setting was a psychiatric unit within a general hospital. All adult admissions for one year were assigned scores on the North Carolina Functional Assessment Scale (NCFAS) and the Global Assessment of Functioning (GAF) scale. Patients were interviewed six months after discharge to determine if they had been rehospitalized and to assign new NCFAS and GAF scores. Results. Significant risk of rehospitalization was predicted by: 1. NCFAS score >90; 2. history of prior hospitalization; 3. nursing home residence; 4. referral from a small community hospital and; 5. non-compliance with outpatient appointments. Conclusions. Global assessments and demographic information collected during an index admission can generate factors to identify patients at risk for rehospitalization within six months. History of prior admissions and non-compliance with outpatient treatment, reported as risk factors in urban settings, were found also to be risk factors in a rural region.He was formerly Assistant Professor, Center for Health Sciences Statistics, East Carolina University School of Medicine. 相似文献
73.
74.
Kevin G Becker Insong J Lee James W Nagle Rachel D Canning Ameer M Gado Rosarelis Torres Mihael H Polymeropoulos Paul T Massa WilliamE Biddison Paul D Drew 《International journal of developmental neuroscience》1997,15(7):73
We describe a novel human zinc finger cNDA, C2H2-171. This cDNA represents an mRNA which encodes a protein of 484 amino acids and a calculated molecular weight of 54 kD. Four zinc finger-like domains are found in the C-terminal end of the protein. At the N-terminus, C2H2-171 contains a POZ/tramtrack-like domain similar to that found in the tumor associated zinc finger proteins LAZ-3/BCL-6 and PLZ-F, as well as in non-zinc finger proteins. C2H2-171 RNA is preferentially expressed in the brain, and increases during the course of murine development, with maximal expression in the adult. C2H2-171 RNA is differentially expressed in brain regions, with the highest level of expression in the cerebellum. C2H2-171 RNA was expressed at high levels in primary cerebellar granule cell neurons compared to astrocytes. The gene encoding C2H2-171 is highly conserved in vertebrates, and maps to the terminus of human chromosome 1 (1q44-ter). This chromosomal location is associated with a number of cytogenetic aberrations including those involving brain developmental anomalies and tumorigenesis. These data suggest that C2H2-171 may play an important role in vertebrate brain development and function. 相似文献
75.
A. Robert Spitzer Shalom Stahl David Yarnitsky Ernest W. Johnson John R. Wilson R. A. C. Hughes Stefania Morino Giovanni Antonini Kiyotoshi Kaneko Yoji Ohnishi Tetsushi Atsumi Isao Hozumi Tadashi Miyatake Tetsuo Furukawa James P. Knochel Ikuo Mineo Seiichiro Tarui Francis O. Walker Andrew J. Gitter Walter C. Stolov Nicholas J. Capozzoli 《Muscle & nerve》1996,19(4):531-538
76.
77.
This article identifies common characteristics of educationally related programs that form a common basis for understanding and working with gifted programs. Special approaches and programs for educational enrichment as well as specific activities that have been successful are discussed. 相似文献
78.
James L. Levenson M.D. Harold J. Fallon M.D. 《The American journal of gastroenterology》1993,88(5):760-761
Interferon-α is the only approved and effective treatment for hepatitis C. Psychiatric side effects are common and have frequently required a decrease in dose or discontinuation of therapy. We here report a case of interferon-α-induced depression in a 40-yr-old man with hepatitis C successfully treated with the antidepressant fluoxetine, which allowed completion of interferon treatment. 相似文献
79.
80.
Janice F. Munro Debra Haire-Joshu Edwin B. Fisher H. James Wedner 《The Journal of asthma》1996,33(5):313-325
Low-income minority patients from East St. Louis, Illinois, a depressed midwestern urban city, who had visited acute care settings with asthma symptoms, participated in a focus group. Questions were constructed around the Health Belief Model to characterize participants' experiences in receiving asthma care, their confidence in long-term asthma self-management, barriers they perceived to managing their asthma, and recommendations they would make for improving asthma care in their community. Analysis of comments suggests an appreciable understanding of asthma triggers, limited coping behaviors for asthma symptoms, very limited practice of active asthma management, perception of the health care system as frequently insensitive to their needs or their knowledge of their own care, exchange of well-articulated information regarding how to deal with the system, and an apparent lack of awareness of any potential contribution of patient education or support system. 相似文献