全文获取类型
收费全文 | 4331篇 |
免费 | 256篇 |
国内免费 | 16篇 |
专业分类
耳鼻咽喉 | 17篇 |
儿科学 | 231篇 |
妇产科学 | 89篇 |
基础医学 | 578篇 |
口腔科学 | 128篇 |
临床医学 | 308篇 |
内科学 | 772篇 |
皮肤病学 | 133篇 |
神经病学 | 543篇 |
特种医学 | 108篇 |
外科学 | 525篇 |
综合类 | 59篇 |
一般理论 | 3篇 |
预防医学 | 296篇 |
眼科学 | 152篇 |
药学 | 408篇 |
中国医学 | 9篇 |
肿瘤学 | 244篇 |
出版年
2023年 | 28篇 |
2022年 | 50篇 |
2021年 | 114篇 |
2020年 | 69篇 |
2019年 | 106篇 |
2018年 | 123篇 |
2017年 | 89篇 |
2016年 | 108篇 |
2015年 | 102篇 |
2014年 | 162篇 |
2013年 | 218篇 |
2012年 | 325篇 |
2011年 | 352篇 |
2010年 | 165篇 |
2009年 | 148篇 |
2008年 | 279篇 |
2007年 | 331篇 |
2006年 | 284篇 |
2005年 | 222篇 |
2004年 | 218篇 |
2003年 | 190篇 |
2002年 | 197篇 |
2001年 | 70篇 |
2000年 | 67篇 |
1999年 | 49篇 |
1998年 | 34篇 |
1997年 | 44篇 |
1996年 | 26篇 |
1995年 | 39篇 |
1994年 | 25篇 |
1993年 | 26篇 |
1992年 | 43篇 |
1991年 | 26篇 |
1990年 | 21篇 |
1989年 | 23篇 |
1988年 | 16篇 |
1987年 | 25篇 |
1986年 | 23篇 |
1985年 | 11篇 |
1984年 | 23篇 |
1983年 | 14篇 |
1982年 | 13篇 |
1981年 | 8篇 |
1980年 | 8篇 |
1979年 | 10篇 |
1977年 | 8篇 |
1975年 | 10篇 |
1974年 | 12篇 |
1971年 | 9篇 |
1966年 | 6篇 |
排序方式: 共有4603条查询结果,搜索用时 15 毫秒
1.
2.
The midwifery art has emphasised the uniqueness of human beings throughout its Nordic history. The educated Nordic midwife has in the last decade celebrated several hundred years of memories. This article studies how the key ideas of the midwifery art and patterns of ideas become evident in the zeitgeist from the beginning of the 19th century to the millennium in the Nordic countries. The legacy and pattern of ideas of the art of midwifery are interpreted in relation to the texts of the selected historical sources and based on Ricoeur's phenomenological-hermeneutic approach to the text and further to the dedication of understanding and interpretation. The historical sources refer to unprinted primary sources from historical archives and printed secondary and tertiary sources. The patterns of ideas include a tripartite whole: the true cultivation of the head, the philosophy and aesthetics of the hand, the strength of the heart and the drive of calling. These ideas open for unique visions and attest to the evident in modern midwives. Today's midwives have academic training with examinations, and the education is based on scientific evidence. The midwife profession is authorised by the state and supervised by the authorities. 相似文献
3.
4.
5.
Hultling Claes; Rosenlund Bjorn; Tornblom Magnus; Sjoblom Peter; Garoff Leena; Nyman Claes; Hillensjo Torbjorn 《Human reproduction (Oxford, England)》1995,10(4):847-850
Treatment of non-seminomatous testicular cancer often leadsto infertility due to anejaculation/retrograde ejaculation andpoor sperm quality. In these men spermatozoa may be obtainedby transrectal electroejaculation (TE), but the optimal strategyfor assisted procreation in these couples is not known. Ouraim was to examine whether TE and conventional in-vitro fertilization(IVF) would be successful. A total of 10 couples, with long-standinginfertility due to anejaculation or retrograde ejaculation aftertreatment for testicular cancer 514 years earlier, werereferred to our unit. All men underwent diagnostic TE undergeneral anaesthesia. Spermatozoa were recovered in nine cases.The antegrade fraction was prepared and used for IVF. Spermquality was variable and conventional IVF was considered impossiblein three cases. Altogether six IVF treatment cycles in six couplesresulted in five pregnancies, of which four resulted in a deliveryand one resulted in a spontaneous abortion. One additional pregnancyis ongoing after transfer of cryopreserved embryos. The fertilizationrate was 54% (33/61) and the cleavage rate was 97% (32/33).No complications relating to the procedure have been encountered. 相似文献
6.
7.
Abhay R Vasavada Mamidipudi R Praveen Sheena A Dholakia Rupal H Trivedi 《Journal of AAPOS》2007,11(2):192-194
We present two children discovered to have a total cataract in one eye with a posterior subcapsular cataract in the other eye. Sequential photography documented rapid progression of the posterior subcapsular cataract to a preexisting posterior capsule defect and subsequently to a white, mature cataract. We propose that early intervention be considered in cases with any posterior subcapsular changes (no matter how subtle) and history of total cataract in the fellow eye, especially in any situation where loss of follow-up is likely to occur. In the event surgery is not advised, parents should be warned about possible cataract progression and the importance of regular follow-up examinations. 相似文献
8.
Leena Joseph R. Anuradha R. Nathuram V. V. Shaha M. C. Abani 《Applied radiation and isotopes》2003,59(5-6):359-362
National intercomparisons of activity measurements of 131I, a radioisotope widely used for diagnosis and therapy of thyroid related ailments, were initiated in 1979 as a quality assurance program, towards improving radiation safety procedures and related dosimetry in Nuclear Medicine Centres (NMCs) in India. Oral administration of a known quantity of radioiodine to patients requires accurate radioactivity measurements to be performed on a well-calibrated isotope calibrators. Under or over estimation of the activity due to a faulty or uncalibrated isotope calibrator could provide misleading results. Calibration of isotope calibrators and the traceablity of subsequent measurements to the national standards laboratory is one of the essential basic radiation safety requirement of the IAEA. In view of the stringent quality assurance requirements for activity measurements imposed by Atomic Energy Regulatory Board, a National Intercomparison Program was initiated and to date ten such intercomparison programs have been conducted by the Radiation Safety Systems Division, of the Bhabha Atomic Research Centre. This program has benefited the participants by making their measurements traceable to the National Primary Standards. Over the years there has been a marked increase in the number of NMCs participating in the intercomparison programs. As a result, the number of institution showing large deviation from the correct value has decreased considerably over the years. This program thus, has enabled participating NMCs to check their isotope calibrators so as to ensure proper delivery of radiation dose to the patients and hence to optimise patient exposure. 相似文献
9.
Anjana Trivedi Jitendra Patel Jagruti Kalola 《Indian journal of otolaryngology and head and neck surgery》2007,59(2):166-167
Oral tuberculosis is very rare and when present they are usually secondary to pulmonary tuberculosis. Tuberculous lesions
of the tongue have become so infrequent that they are virtually a forgotten disease entity and may pose a diagnostic problem.
The case reported in this paper emphasizes the importance of including tuberculosis in the differential diagnosis of any chronic
oral ulcer. The low number of oral infections by M. tuberculosis could be due to underreporting. 相似文献
10.
Gabrielle A. Carlson M.D. Leena Ranade M.D. Aftab Qadir M.D. 《The Psychiatric quarterly》1992,63(4):391-411
This article summarizes the ways in which a clinician should think about medication use in children and describes practical usage of the most frequently used child psychopharmacologic agents.Leena Ranade, M.D., and Aftab Qadir, M.D., were Fellows in Child Psychiatry, State University of New York at Stony Brook at the time of writing this article. 相似文献