全文获取类型
收费全文 | 8863篇 |
免费 | 430篇 |
国内免费 | 27篇 |
专业分类
耳鼻咽喉 | 139篇 |
儿科学 | 697篇 |
妇产科学 | 217篇 |
基础医学 | 935篇 |
口腔科学 | 155篇 |
临床医学 | 611篇 |
内科学 | 2146篇 |
皮肤病学 | 135篇 |
神经病学 | 359篇 |
特种医学 | 391篇 |
外科学 | 1293篇 |
综合类 | 255篇 |
一般理论 | 5篇 |
预防医学 | 333篇 |
眼科学 | 288篇 |
药学 | 602篇 |
1篇 | |
中国医学 | 40篇 |
肿瘤学 | 718篇 |
出版年
2023年 | 55篇 |
2022年 | 141篇 |
2021年 | 319篇 |
2020年 | 154篇 |
2019年 | 241篇 |
2018年 | 302篇 |
2017年 | 211篇 |
2016年 | 250篇 |
2015年 | 286篇 |
2014年 | 360篇 |
2013年 | 472篇 |
2012年 | 699篇 |
2011年 | 750篇 |
2010年 | 434篇 |
2009年 | 388篇 |
2008年 | 530篇 |
2007年 | 534篇 |
2006年 | 469篇 |
2005年 | 430篇 |
2004年 | 395篇 |
2003年 | 309篇 |
2002年 | 294篇 |
2001年 | 105篇 |
2000年 | 121篇 |
1999年 | 99篇 |
1998年 | 66篇 |
1997年 | 55篇 |
1996年 | 42篇 |
1995年 | 22篇 |
1994年 | 31篇 |
1993年 | 27篇 |
1992年 | 66篇 |
1991年 | 72篇 |
1990年 | 61篇 |
1989年 | 66篇 |
1988年 | 41篇 |
1987年 | 44篇 |
1986年 | 35篇 |
1985年 | 39篇 |
1984年 | 20篇 |
1983年 | 24篇 |
1982年 | 22篇 |
1981年 | 16篇 |
1980年 | 15篇 |
1979年 | 27篇 |
1976年 | 22篇 |
1973年 | 16篇 |
1969年 | 13篇 |
1968年 | 13篇 |
1966年 | 14篇 |
排序方式: 共有9320条查询结果,搜索用时 46 毫秒
1.
2.
3.
4.
5.
6.
Rajesh Verma Puneet Kumar Dixit Rakesh Lalla Babita Singh 《Annals of Indian Academy of Neurology》2015,18(2):246-248
Mirror movements are simultaneous, involuntary, identical movements occurring during contralateral voluntary movements. These movements are considered as soft neurologic signs seen uncommonly in clinical practice. The mirror movements are described in various neurological disorders which include parkinsonism, cranio veretebral junction anamolies, and hemiplegic cerebral palsy. These movements are intriguing and can pose significant disability. However, no such observation regarding mirror movements in progressive hemifacial atrophy have been reported previously. We are reporting a teenage girl suffering from progressive hemifacial atrophy and epilepsy with demonstrable mirror movements in hand. 相似文献
7.
Sameer Arora Kamal Shemisa Muthiah Vaduganathan Arman Qamar Ankur Gupta Sushil K. Garg Dharam J. Kumbhani Helen Mayo Houman Khalili Ambarish Pandey Sandeep R. Das 《Journal of the American College of Cardiology》2019,73(19):2454-2464
Ticagrelor is a cornerstone of modern antithrombotic therapy alongside aspirin in patients with acute coronary syndrome and after percutaneous coronary intervention. Adverse effects such as bleeding and dyspnea have been associated with premature ticagrelor discontinuation, which may limit any potential advantage of ticagrelor over clopidogrel. The randomized trials of ticagrelor captured adverse events, offering the opportunity to more precisely quantify these effects across studies. Therefore, a meta-analysis of 4 randomized clinical trials of ticagrelor conducted between January 2007 and June 2017 was performed to quantify the incidence and causes of premature ticagrelor discontinuation. Among 66,870 patients followed for a median 18 months, premature ticagrelor discontinuation was seen in 25%; bleeding was the most common cause of discontinuation followed by dyspnea. Versus the comparators, the relative risk of dyspnea-related discontinuation during follow-up was 6.4-fold higher, the relative risk of bleeding was 3.2-fold higher, and the relative risk of discontinuation due to any adverse event was 59% higher for patients receiving ticagrelor. Understanding these potential barriers to adherence to ticagrelor is crucial for informed patient-physician decision making and can inform future efforts to improve ticagrelor adherence. This review discusses the incidence, causes, and biological mechanisms of ticagrelor-related adverse effects and offers strategies to improve adherence to ticagrelor. 相似文献
8.
9.
Surender Kumar Yachha Rakesh Aggarwal S Srinivas Anshu Srivastava Sanjay K Somani Srivenu Itha 《Indian journal of gastroenterology》2006,25(3):132-135
BACKGROUND: We prospectively evaluated the usefulness of IgA tissue transglutaminase antibodies (IgA tTG) in the initial diagnosis of celiac disease (CD) and compared its diagnostic potential with that of IgA anti-endomysial antibodies (IgA EMA) and anti-IgA and IgG gliadin antibodies (AGA and AGG, respectively). METHODS: Sera of 23 untreated children fulfilling the revised ESPGHAN criteria for diagnosis of CD (Group I; mean age 10.8 y); 19 disease controls (Group II; mean age 8.5 y) presenting with chronic diarrhea, short stature or both; and 22 healthy children (Group III; mean age 8.8 y) were studied. These were tested in a blinded manner for AGA, AGG, IgA tTG (guinea pig as antigen) and IgA EMA. RESULTS: In Group I, IgA EMA was positive in 19, IgA tTG in 17, AGA in 14 and AGG in 17 patients. In Group II, these tests were positive in 1, 0, 2 and 14 patients, respectively and in Group III, in 0, 0, 0 and 1 child, respectively. Analyzing data from Group I and II, IgA EMA, IgA tTG, AGA and AGG had sensitivity rates of 83%, 74%, 61% and 74%, respectively; the specificity rates were 95%, 100%, 89% and 26%; positive predictive values were 95%, 100%, 88% and 55% and negative predictive values were 82%, 74%, 65% and 45%, respectively. CONCLUSION: IgA tTG is useful for the diagnosis of CD, with sensitivity and specificity rates comparable to those of EMA and this test is well suited for use in tropical countries like India. 相似文献
10.
A. Al Tahan S. Arora A. Alzeer F. Al Tahan T. Malabarey A. Daif 《European journal of neurology》1997,4(1):52-58
The diagnosis of acute disseminated encephalomyelitis (ADEM) is frequently missed or delayed with consequent delay in instituting therapy in the crucial phase of the illness. The role of MRI in the diagnosis of ADEM is well established, however, the value of its early utilization of treatment on the outcome of patients has not been adequately stressed. Three patients with ADEM are described. Delay in the diagnosis of the first was associated with severe sequelae, while in the other two early diagnosis and institution of corticosteroid therapy which was facilitated by MRI, was associated with a better outcome. MRI should be carried out early once the diagosis of ADEM is entertained. 相似文献