全文获取类型
收费全文 | 24230篇 |
免费 | 1258篇 |
国内免费 | 78篇 |
专业分类
耳鼻咽喉 | 332篇 |
儿科学 | 1383篇 |
妇产科学 | 609篇 |
基础医学 | 2697篇 |
口腔科学 | 555篇 |
临床医学 | 1339篇 |
内科学 | 5112篇 |
皮肤病学 | 769篇 |
神经病学 | 1500篇 |
特种医学 | 763篇 |
外科学 | 3163篇 |
综合类 | 756篇 |
一般理论 | 15篇 |
预防医学 | 1208篇 |
眼科学 | 1287篇 |
药学 | 2242篇 |
中国医学 | 160篇 |
肿瘤学 | 1676篇 |
出版年
2023年 | 150篇 |
2022年 | 140篇 |
2021年 | 738篇 |
2020年 | 431篇 |
2019年 | 558篇 |
2018年 | 718篇 |
2017年 | 490篇 |
2016年 | 622篇 |
2015年 | 573篇 |
2014年 | 920篇 |
2013年 | 1121篇 |
2012年 | 1580篇 |
2011年 | 1724篇 |
2010年 | 915篇 |
2009年 | 760篇 |
2008年 | 1175篇 |
2007年 | 1224篇 |
2006年 | 1224篇 |
2005年 | 1046篇 |
2004年 | 960篇 |
2003年 | 817篇 |
2002年 | 749篇 |
2001年 | 698篇 |
2000年 | 700篇 |
1999年 | 549篇 |
1998年 | 220篇 |
1997年 | 149篇 |
1996年 | 127篇 |
1995年 | 149篇 |
1994年 | 112篇 |
1993年 | 99篇 |
1992年 | 367篇 |
1991年 | 370篇 |
1990年 | 338篇 |
1989年 | 328篇 |
1988年 | 284篇 |
1987年 | 251篇 |
1986年 | 234篇 |
1985年 | 232篇 |
1984年 | 171篇 |
1983年 | 134篇 |
1981年 | 90篇 |
1979年 | 157篇 |
1978年 | 97篇 |
1977年 | 80篇 |
1975年 | 83篇 |
1974年 | 100篇 |
1973年 | 92篇 |
1972年 | 118篇 |
1970年 | 78篇 |
排序方式: 共有10000条查询结果,搜索用时 287 毫秒
1.
Misra Durga Prasanna Rathore Upendra Kopp Chirag Rajkumar Patro Pallavi Agarwal Vikas Sharma Aman 《Clinical rheumatology》2022,41(12):3601-3613
Clinical Rheumatology - Takayasu arteritis (TAK) is a less common large-vessel vasculitis which can occur in either children or adults. However, differences between pediatric-onset and adult-onset... 相似文献
2.
3.
Raya Saab MD Anas Obeid MD Fatiha Gachi MD Houda Boudiaf MD Lilit Sargsyan MD Khulood Al-Saad MD Tamar Javakhadze MD Azim Mehrvar MD Sawsan Sati Abbas MD Yasir Saadoon Abed Al-Agele MD Salma Al-Haddad MD Mouroge Hashim Al Ani MD Suleiman Al-Sweedan MD Amani Al Kofide MD Wasil Jastaniah MD Nisreen Khalifa MD Elie Bechara MD Malek Baassiri MD Peter Noun MD Jamila El-Houdzi MD Mohammed Khattab MD Krishna Sagar Sharma MD Yasser Wali MD Naureen Mushtaq MD Aliya Batool MD Mahwish Faizan MD Muhammad Rafie Raza MD Mohammad Najajreh MD Mohammed Awad Mohammed Abdallah MD Ghada Sousan MD Khaled M. Ghanem MD Ulker Kocak MD Tezer Kutluk MD Hacı Ahmet Demir MD Hamoud Hodeish MD Samar Muwakkit MD Asim Belgaumi MD Abdul-Hakim Al-Rawas MD Sima Jeha MD 《Cancer》2020,126(18):4235-4245
4.
Determinants of Tobacco Use among Children of a Rural Village in India: An Exploratory Qualitative Study 下载免费PDF全文
Akanksha GoyalAshish SharmaSunita AgarwalSuman BhansaliKumar Gaurav ChhabraChaya Chhabra 《Asian Pacific journal of cancer prevention》2020,21(1):81-86
Background: Tobacco is one of the leading causes of preventable deaths. It is both a major social and health problem. According to National Sample Survey Organization of Government of India about 20 million children of ages 10-14 are estimated to be tobacco-addicted. There are grave consequences of tobacco both socially and also on health thus it is of utmost importance to understand the factors leading to its use and to plan strategies to reduce its intake. However, the health implications of this social issue in a rural context have not been explored. Aims and Objective: this study makes an attempt to explore the health and social implications of tobacco usage by the children below the age of 14 years in hamlet. Materials and Methods: The present study employed a qualitative study design. Data was collected using focus group discussion and in-depth interview of key informants. Thematic analysis for exploring the explicit and implicit meanings within the data was done. The themes which emerged were knowledge about tobacco and the various products available, children and parents’ tobacco use and habits, the health and social implication of tobacco use, reasons for tobacco use by the children. Results: It was found tobacco use by the children was very common in the community. Parent, peer pressure, sibling pressure were found to be playing important role in the initiation of tobacco habit by the child. Further illiteracy and lack of awareness was also lead to tobacco use among children. Conclusion: The study identifies education and awareness of parents about the ill-effects of tobacco play an important role as parents act as role model for their children, thus equal stress should be laid in improving the parental habits. Even raising the prices of tobacco products can help in controlling this habit. 相似文献
5.
Matthew Malone Blaine G. Fritz Karen Vickery Saskia Schwarzer Varun Sharma Nathan Biggs Michael Radzieta Thomas T. Jeffries Hugh G. Dickson Slade O. Jensen Thomas Bjarnsholt 《APMIS : acta pathologica, microbiologica, et immunologica Scandinavica》2019,127(10):660-670
Multiple approaches were employed to detect pathogens from bone margins associated with Diabetic Foot Osteomyelitis (DFO). Intra‐operative bone specimens of 14 consecutive subjects with suspected DFO were collected over a six‐month study period from Liverpool Hospital. Infected bone and a proximal bone margins presumed to be ‘clean/non‐infected’ were collected. Bone material was subjected to conventional culture, DNA sequencing and microscopy. In total, eight of 14 (57%) proximal bone margins had no growth by conventional culture but were identified in all proximal bone specimens by DNA sequencing. Proximal margins had lower median total microbial counts than infected specimens, but these differences were not statistically significant. Pathogens identified by sequencing in infected specimens were identified in proximal margins and the microbiomes were similar (ANOSIM = 0.02, p = 0.59). Using a combination of SEM and/or PNA‐FISH, we visualized the presence of microorganisms in infected bone specimens and their corresponding proximal margins of seven patients (50%) with DFO. We identify that bacteria can still reside in what seems to be proximal ‘clean’ margins. The significance and implications of clinical outcomes requires further analysis from a larger sample size that incorporates differences in surgical and post‐operative approaches, correlating any outcomes back to culture‐sequence findings. 相似文献
6.
Tarun Shankar Choudhary Akanksha Srivastava Ranadip Chowdhury Sunita Taneja Rajiv Bahl Jose Martines Maharaj Kishan Bhan Nita Bhandari 《Maternal & child nutrition》2019,15(4)
Burden and risk factors for wasting in the first 6 months of life among Indian children are not well documented. We used data from India's National Family Health Survey 4 to estimate the prevalence of severe wasting (weight for length < ‐3 SD) among 18,898 infants under 6 months of age. We also examined the association of severe wasting with household, maternal, and child‐related factors using multivariable logistic regression analysis. Prevalence of severe wasting among infants less than 6 months of age was 14.8%, ranging from 3.5 to 21% across states. Low birth weight (<2,500 g; adjusted odds ratio [AOR] 1.40, 95% CI [1.19, 1.65]), nonutilization of supplementary nutrition by mother during lactation (AOR 1.23, 95% CI [1.05, 1.43]), and anthropometric assessment during summer (AOR 1.37, 95% CI [1.13, 1.65]) and monsoon months (AOR 1.53, 95% CI [1.20, 1.95]) were associated with higher odds of severe wasting. Infants aged 2 to 3 months (AOR 0.78, 95% CI [0.66, 0.93]) and 4 to 5 months (AOR 0.65, 95% CI [0.55, 0.73]) had lower odds of severe wasting as compared with the 0‐ to 1‐month category. This analysis reveals a high burden of severe wasting in infants less than 6 months in India. Preventive interventions must be targeted at reducing low birth weight due to fatal growth restriction and prematurity. Appropriate care practices at facilities and postdischarge with extra attention to those born small and sick can prevent further deterioration in nutritional status. 相似文献
7.
Ashok Garg Deepak Agrawal Deepika Mishra Gyarsi Lal Sharma 《Echocardiography (Mount Kisco, N.Y.)》2019,36(7):1421-1422
Raghib syndrome is a rare developmental complex consisting of termination of the left superior vena cava in the left atrium, absence of the coronary sinus, and an atrial septal defect commonly located at the posterior‐inferior angle of the atrial septum. This complex was considered unique to Raghib syndrome; however, cases with a normal atrial septum have been reported where the orifice of the unroofed coronary sinus functions as the inter‐atrial communication. Our patient demonstrated an isolated persistent left superior vena cava draining into the left atrium through unroofed coronary sinus and presence of ostium primum atrial septal defect. 相似文献
8.
9.
10.
Kirandeep Kaur Rashi Sharma Atamjit Singh Shivani Attri Saroj Arora Sarabjit Kaur Neena Bedia 《中草药(英文版)》2022,14(4):511-527
Alkannin/shikonin (A/S) and their derivatives are naturally occurring naphthoquinones majorly found in Boraginaceae family plants. They are integral constituents of traditional Chinese medicine Zicao (roots of Lithospermum erythrorhizon). In last two decades significant increase in pharmacological investigations on alkannin/shikonin and their derivatives has been reported that resulted in discovery of their novel mechanisms in various diseases and disorders. This review throws light on recently conducted pharmacological investigations on alkannin/shikonin and their derivatives and their outputs. Various analytical aspects are also discussed and brief summary of patent applications on inventions containing alkannin/shikonin and its derivatives is also provided. 相似文献