全文获取类型
收费全文 | 5947篇 |
免费 | 397篇 |
国内免费 | 22篇 |
专业分类
耳鼻咽喉 | 50篇 |
儿科学 | 282篇 |
妇产科学 | 121篇 |
基础医学 | 704篇 |
口腔科学 | 183篇 |
临床医学 | 480篇 |
内科学 | 1284篇 |
皮肤病学 | 119篇 |
神经病学 | 299篇 |
特种医学 | 240篇 |
外科学 | 891篇 |
综合类 | 88篇 |
一般理论 | 3篇 |
预防医学 | 328篇 |
眼科学 | 200篇 |
药学 | 652篇 |
中国医学 | 52篇 |
肿瘤学 | 390篇 |
出版年
2023年 | 56篇 |
2022年 | 142篇 |
2021年 | 233篇 |
2020年 | 128篇 |
2019年 | 172篇 |
2018年 | 211篇 |
2017年 | 140篇 |
2016年 | 160篇 |
2015年 | 176篇 |
2014年 | 267篇 |
2013年 | 314篇 |
2012年 | 456篇 |
2011年 | 482篇 |
2010年 | 256篇 |
2009年 | 208篇 |
2008年 | 364篇 |
2007年 | 363篇 |
2006年 | 326篇 |
2005年 | 268篇 |
2004年 | 261篇 |
2003年 | 225篇 |
2002年 | 241篇 |
2001年 | 62篇 |
2000年 | 47篇 |
1999年 | 58篇 |
1998年 | 40篇 |
1997年 | 28篇 |
1996年 | 24篇 |
1995年 | 32篇 |
1994年 | 16篇 |
1993年 | 28篇 |
1992年 | 36篇 |
1991年 | 39篇 |
1990年 | 35篇 |
1989年 | 30篇 |
1988年 | 25篇 |
1987年 | 29篇 |
1986年 | 22篇 |
1984年 | 37篇 |
1983年 | 19篇 |
1982年 | 24篇 |
1981年 | 21篇 |
1980年 | 26篇 |
1979年 | 23篇 |
1978年 | 17篇 |
1977年 | 16篇 |
1975年 | 14篇 |
1974年 | 14篇 |
1973年 | 18篇 |
1970年 | 14篇 |
排序方式: 共有6366条查询结果,搜索用时 15 毫秒
81.
Bhavana R. Doshi M.D. Sunanda Mahajan M.D. D.V.D. Vidya Kharkar M.D. D.V.D. Uday S. Khopkar M.D. D.N.B. 《Pediatric dermatology》2013,30(4):e48-e51
Abstract: Two infants presented with multiple asymptomatic papules and geographic and annular plaques over the extensor aspect of the upper and lower extremities and trunk. Skin biopsy of both lesions showed plugged and hyperplastic dilated acrosryingia and deep dermal ducts, along with granulomatous inflammatory reaction. These lesions showed self‐healing with complete resolution. A previous report described similar clinical and histopathologic features and labeled it giant centrifugal miliaria profunda. Because of the large granulomatous plaques and deep infiltrate, we propose that it was a granulomatous variant of giant centrifugal miliaria profunda. We report these cases for their rarity and self‐healing nature. 相似文献
82.
Mohana Krishna Reddy Mudiam Rajeev Jain Anshuman Singh Haider A. Khan Devendra Parmar 《Forensic Toxicology》2014,32(1):19-29
3-Phenoxybenzoic acid (3-PBA) and 4-hydroxy-3-phenoxybenzoic acid (OH-PBA) are the two common metabolites for most pyrethroid insecticides. A rapid, sensitive, and eco-friendly method has been developed based on ultrasound-assisted dispersive liquid–liquid microextraction (DLLME) coupled to large volume injection–gas chromatography–tandem mass spectrometry for the simultaneous determination of pyrethroid metabolites in rat brain treated with cypermethrin (CYP). Brain samples were homogenized in methanol (disperser solvent) followed by derivatization with methyl chloroformate (MCF) and extraction using DLLME. Factors that influence the extraction and derivatization efficiency such as type and volume of extraction and disperser solvent, sonication time, pH, ionic strength, and volumes of MCF and pyridine were optimized. Under optimized conditions, the limits of detection were 1 and 4 ng/g for 3-PBA and OH-PBA, respectively. Mean recoveries of pyrethroid metabolites in rat brain were in the range of 83–95 %. The developed method was successfully applied for determination of 3-PBA and OH-PBA in brain samples of CYP-treated rats. The developed method can be adopted for rapid and sensitive analysis of pyrethroid metabolites in toxicological and forensic laboratories. 相似文献
83.
It is quite challenging to deal with the health care needs of migrant populations in general, especially pregnant women, due to their diverse sociopolitical and cultural beliefs and practices. In this article, we aim to examine and understand the food habits and beliefs of pregnant British Bangladeshis using qualitative methods. Our results indicate some positive associations between the increased intakes of particular foods to ensure healthy outcomes. We also note that migration affects pregnant Bangladeshi women's physical and mental conditions. We conclude that effective health care and awareness about traditional food beliefs and habits, and their subsequent reflection into the national and local policy agendas, may bring forth positive changes and improve the overall health of pregnant women. 相似文献
84.
85.
86.
Predictive Value of D‐Dimer Levels and Tissue Doppler Mitral Annular Systolic Velocity for Detection of Left Atrial Appendage Thrombus in Patients with Mitral Stenosis in Sinus Rhythm
下载免费PDF全文
![点击此处可从《Echocardiography (Mount Kisco, N.Y.)》网站下载免费的PDF全文](/ch/ext_images/free.gif)
87.
Practice and safety of allergen‐specific immunotherapy for allergic rhinitis in the UK national health service: A report of “real world” clinical practice
下载免费PDF全文
![点击此处可从《Clinical and experimental allergy》网站下载免费的PDF全文](/ch/ext_images/free.gif)
88.
Indranil Chakrabarti Satabdi Mondal Bidyut Krishna Goswami 《Saudi Journal of Ophthalmology》2014,28(3):247-249
Malignant teratoid medulloepithelioma of ciliary body is an extremely rare tumor usually occurring in children younger than 5 years of age and is usually amelanotic. Here, we report a very rare case of pigmented malignant teratoid medulloepithelioma in a 20-year old male patient who presented initially with pain, redness and proptosis of right eyeball. The right eyeball was enucleated. A histopathological diagnosis of orbital teratoma was made and no further treatment was given. Four months later, the patient developed another swelling in the same area. A review of the previous histopathology slides revealed a pigmented malignant teratoid medulloepithelioma. No nerve involvement was seen. MRI did not show any intracranial extension. The mass along with rest of the orbital tissue was removed. No adjuvant chemotherapy or radiotherapy was given due to the lack of intracranial extension. The patient was symptom free at 2-year follow-up and the repeat MRI also showed no evidence of recurrence. 相似文献
89.
90.
Manuel Valdebran Justin Bandino Amira Elbendary Abdallah Gad Krishna C. Arudra Sébastien de Feraudy Dirk M. Elston 《Journal of cutaneous pathology》2018,45(3):204-207