全文获取类型
收费全文 | 17837篇 |
免费 | 1487篇 |
国内免费 | 28篇 |
专业分类
耳鼻咽喉 | 150篇 |
儿科学 | 481篇 |
妇产科学 | 507篇 |
基础医学 | 2453篇 |
口腔科学 | 585篇 |
临床医学 | 2053篇 |
内科学 | 3172篇 |
皮肤病学 | 404篇 |
神经病学 | 1693篇 |
特种医学 | 816篇 |
外科学 | 2291篇 |
综合类 | 455篇 |
一般理论 | 17篇 |
预防医学 | 1980篇 |
眼科学 | 233篇 |
药学 | 1115篇 |
1篇 | |
中国医学 | 16篇 |
肿瘤学 | 930篇 |
出版年
2022年 | 139篇 |
2021年 | 255篇 |
2020年 | 191篇 |
2019年 | 294篇 |
2018年 | 349篇 |
2017年 | 257篇 |
2016年 | 251篇 |
2015年 | 278篇 |
2014年 | 405篇 |
2013年 | 614篇 |
2012年 | 827篇 |
2011年 | 828篇 |
2010年 | 507篇 |
2009年 | 469篇 |
2008年 | 709篇 |
2007年 | 736篇 |
2006年 | 684篇 |
2005年 | 696篇 |
2004年 | 693篇 |
2003年 | 663篇 |
2002年 | 639篇 |
2001年 | 608篇 |
2000年 | 664篇 |
1999年 | 563篇 |
1998年 | 239篇 |
1997年 | 200篇 |
1996年 | 232篇 |
1995年 | 184篇 |
1994年 | 149篇 |
1993年 | 152篇 |
1992年 | 436篇 |
1991年 | 402篇 |
1990年 | 406篇 |
1989年 | 372篇 |
1988年 | 316篇 |
1987年 | 336篇 |
1986年 | 297篇 |
1985年 | 303篇 |
1984年 | 281篇 |
1983年 | 231篇 |
1982年 | 130篇 |
1980年 | 131篇 |
1979年 | 200篇 |
1978年 | 150篇 |
1976年 | 126篇 |
1975年 | 139篇 |
1974年 | 143篇 |
1973年 | 145篇 |
1972年 | 148篇 |
1971年 | 116篇 |
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
61.
62.
Mark D Herron Sheryll L Vanderhooft Carrie Byington Jerald D King 《Journal of perinatology》2003,23(3):256-259
Aspergillosis is an uncommon neonatal infection, diagnosed with an increasing frequency over the last two decades. We report a premature neonate who developed aspergillosis while receiving amphotericin B and fluconazole for candidiasis. Despite early recognition and diagnosis, the infant died. We review the clinical appearance of Aspergillus species, the distinctions between primary cutaneous aspergillosis and invasive aspergillosis, and advances in diagnosis and treatment. 相似文献
63.
King JE 《Annals of surgery》1939,109(5):649-688
64.
Arlene S. King William J. Threlfall Pierre R. Band Richard P. Gallagher 《American journal of industrial medicine》1994,26(1):125-132
The mortality profile of female nurses and teachers in British Columbia (BC) was examined using age-standardized proportional mortality ratios (PMRs) calculated for the period 1950–1984. Lowered overall mortality among nurses was seen for degenerative heart disease and for cerebrovascular accidents. Significantly elevated PMR values were observed for cancer of the breast and ovary in nurses of age 20–65 years. PMRs were significantly elevated for cancer of the pancreas and leukemia among those age 20 years and older. Elevated values were also observed for motor vehicle accidents and suicide among nurses in both age groups. Lower than expected mortality from degenerative heart disease and cerebrovascular accidents was seen in working age teachers (age 20–65 years). However, elevated PMRs were detected for carcinoma of the colon, breast, endometrium, brain, and melanoma. Among those 20 years and over, significantly elevated PMRs were also observed for cancers of the ovary and other digestive organs. Elevated PMRs were found for motor vehicle and aircraft accidents. Mortality from cirrhosis of the liver was lower than anticipated in both teachers and nurses. A number of significant PMRs declined when deaths of “homemakers” were withdrawn from the comparison group used to generate PMR values, suggesting that risk of death from various causes among women working outside the home differ from those seen in women who are predominantly in the home. 相似文献
65.
The purpose of this paper was to compare the findings from three randomized clinical trials that investigated alternative treatments of Class II, division 1 malocclusion in young children. The trials were conducted at the University of North Carolina, the University of Florida, and the University of Pennsylvania. The appliances investigated in each center were a functional appliance versus a headgear. Variations in the specific aims and the working hypotheses were noted. The types of appliances, length of treatment, and methods of evaluation were also different. A general comparison of selected clinically relevant findings reveals similarities and differences in conclusions, but underlines the importance of assessing each study on the basis of its original hypothesis. The separate and combined contribution of these studies to the state of knowledge and research is discussed. 相似文献
66.
Certified nurse-midwives and family physicians share a philosophy of family-centered maternity care. Collaboration between the two disciplines, however, has not been common. Collaboration can enhance the primary care and maternity care options available to clients of such collaborative practices. Advantages and barriers to collaboration for both types of practitioners, as well as suggestions for successful collaboration, are discussed. 相似文献
67.
68.
ATP as an Osteoclast Regulator? 总被引:1,自引:1,他引:0
69.
Despite empirical evidence that cardiac rehabilitation programs can play a significant role in enhancing recovery following a primary cardiac event and in enacting secondary prevention measures, attendance rates remain remarkably low. Referral and attendance at cardiac rehabilitation programs are not one and the same. Recognizing this, issues related to the referral of eligible patients to cardiac rehabilitation and factors that affect patients' decisions regarding attendance must be identified and addressed. This article presents an overview of the potential benefits of cardiac rehabilitation programs, describes salient issues related to referral and attendance, and identifies directions for future research. 相似文献
70.
B. M. Herbertson A. J. King J. Allen 《International journal of experimental pathology》1987,68(2):167-177
In Wistar rats a single intravascular injection of lead nitrate causes substantial cellular proliferation in the proximal tubules of the kidneys and in the epithelium of the renal pelvis, ureters and urinary bladder. The tritiated thymidine labelling index (LI) reaches a peak 18 to 24 h after injection and the mitotic index (MI) increases to a comparable extent 6 to 10 h later. The proliferation is most prominent in the bladder and proximal tubules and is virtually complete at 48 h. After a single intraperitoneal injection the proliferative changes are confined to the ureteric and bladder epithelium. In all affected tissues the proliferation develops without preceding necrosis and appears to be a hyperplastic phenomenon. After intravascular administration the volume of urine and its total protein content are significantly increased and certain proteins were detected which were not present in the urine of saline controls. 相似文献