全文获取类型
收费全文 | 1935篇 |
免费 | 93篇 |
国内免费 | 3篇 |
专业分类
耳鼻咽喉 | 20篇 |
儿科学 | 68篇 |
妇产科学 | 53篇 |
基础医学 | 208篇 |
口腔科学 | 40篇 |
临床医学 | 204篇 |
内科学 | 456篇 |
皮肤病学 | 19篇 |
神经病学 | 116篇 |
特种医学 | 85篇 |
外科学 | 283篇 |
综合类 | 24篇 |
一般理论 | 2篇 |
预防医学 | 125篇 |
眼科学 | 73篇 |
药学 | 145篇 |
中国医学 | 21篇 |
肿瘤学 | 89篇 |
出版年
2023年 | 18篇 |
2022年 | 43篇 |
2021年 | 93篇 |
2020年 | 52篇 |
2019年 | 63篇 |
2018年 | 56篇 |
2017年 | 46篇 |
2016年 | 60篇 |
2015年 | 65篇 |
2014年 | 74篇 |
2013年 | 107篇 |
2012年 | 176篇 |
2011年 | 138篇 |
2010年 | 69篇 |
2009年 | 55篇 |
2008年 | 116篇 |
2007年 | 122篇 |
2006年 | 102篇 |
2005年 | 95篇 |
2004年 | 66篇 |
2003年 | 49篇 |
2002年 | 58篇 |
2001年 | 43篇 |
2000年 | 27篇 |
1999年 | 17篇 |
1998年 | 20篇 |
1997年 | 12篇 |
1996年 | 8篇 |
1995年 | 11篇 |
1994年 | 10篇 |
1993年 | 7篇 |
1992年 | 15篇 |
1991年 | 11篇 |
1990年 | 10篇 |
1989年 | 8篇 |
1988年 | 7篇 |
1987年 | 9篇 |
1986年 | 13篇 |
1985年 | 8篇 |
1982年 | 8篇 |
1981年 | 5篇 |
1980年 | 5篇 |
1979年 | 10篇 |
1978年 | 7篇 |
1976年 | 3篇 |
1974年 | 3篇 |
1973年 | 3篇 |
1970年 | 3篇 |
1969年 | 4篇 |
1968年 | 4篇 |
排序方式: 共有2031条查询结果,搜索用时 46 毫秒
81.
Rohit Kumar Shruti Bhandari Sunny R. K. Singh Sindhu Malapati Kamila I. Cisak 《British journal of haematology》2020,189(3):543-550
Heparin-induced thrombocytopenia (HIT) is an immune-mediated adverse reaction to heparin products characterized by thrombocytopenia with or without thrombosis. This study aimed to determine the incidence, morbidity, mortality and economic burden of HIT in solid-malignancy-related hospitalizations. We analyzed the National Inpatient Sample Database (NIS), the largest public database of hospital admissions in the United States, from January 2012 to September 2015. The primary outcome of the study was the incidence of HIT. Secondary outcomes included incidence of venous thrombosis (acute deep venous thrombosis and pulmonary embolism), arterial thrombosis (thrombotic stroke, myocardial infarctions and other arterial thromboembolism), mortality associated with HIT, length of stay, total hospital charges and disposition. During the study period, 7 437 049 hospitalizations had an associated diagnosis of solid malignancy. Approximately 0·08% (n = 6225) hospitalizations had a secondary diagnosis of HIT in this population. The standardized incidence of total thrombotic events was higher in the solid malignancy with HIT compared to the solid malignancy without HIT group (24·7% vs. 6·8%, P < 0·001). The standardized mortality rate was 4·8% in solid malignancy with HIT compared to 3·4% in the without HIT group (OR, 1·53; 95% CI, 1·25–1·89; P < 0·001). HIT in solid malignancy is a rare condition but associated with increased morbidity and mortality. 相似文献
82.
Rashid N Lui Sunny H Wong Sergio A Sánchez-Luna Gianluca Pellino Steven Bollipo Mei-Yin Wong Philip W Y Chiu Joseph J Y Sung 《Journal of gastroenterology and hepatology》2020,35(5):749-759
From its beginning in December 2019, the coronavirus disease 2019 outbreak has spread globally from Wuhan and is now declared a pandemic by the World Health Organization. The sheer scale and severity of this pandemic is unprecedented in the modern era. Although primarily a respiratory tract infection transmitted by direct contact and droplets, during aerosol-generating procedures, there is a possibility of airborne transmission. In addition, emerging evidence suggests possible fecal–oral spread of the virus. Clinical departments that perform endoscopy are faced with daunting challenges during this pandemic. To date, multiple position statements and guidelines have been issued by various professional organizations to recommend practices in endoscopic procedures. This article aims to summarize and discuss available evidence for these practices, to provide guidance for endoscopy to enhance patient safety, avoid nosocomial outbreaks, protect healthcare personnel, and ensure rational use of personal protective equipment. Responses adapted to national recommendations and local infection control guidelines and tailored to the availability of medical resources are imminently needed to fight the coronavirus disease 2019 pandemic. 相似文献
83.
Robert L. Koegel Sunny Kim Lynn Kern Koegel 《Journal of autism and developmental disorders》2014,44(9):2197-2208
An important line of research relates to whether school personnel, such as paraprofessionals, who are present during unstructured social periods, such as lunch-recess, could successfully implement interventions to improve socialization between students with ASD and their typical peers in a group setting. Therefore, within the context of a multiple baseline across participants design, we assessed whether training paraprofessionals to provide social interventions would enhance social development in students with ASD in a group setting. Results showed that paraprofessionals who were not providing any social opportunities during baseline were able to meet fidelity of implementation following a brief training. Consequently, the children with ASD increased their levels of engagement and rates of initiation with typically developing peers following intervention. Implications for training paraprofessionals to implement effective social interventions for students with ASD are discussed. 相似文献
84.
Kit-fai Lee Ching-ning Chong Ka-wing Ma Eric Cheung John Wong Sunny Cheung Paul Lai 《Surgical endoscopy》2014,28(9):2690-2694
Background
Mirizzi syndrome (MS) is a rare complication of gallstone disease. Despite the fact that successful laparoscopic treatments have been reported, open surgery remains the gold standard approach for this disease due to technical difficulties involved.Methods
A minimally invasive strategy combining endoscopic retrograde cholangiopancreatography (ERCP) and robotic surgery for the management of MS was implemented in early 2012. This consisted of a preoperative ERCP for definitive diagnosis and endoscopic stent insertion. Robotic surgical approach was used during operation to facilitate gall bladder removal and suture of defect over common duct. ERCP was repeated postoperatively for stent removal. Patient demographics and treatment outcomes were collected prospectively. A historical cohort of patients with MS who underwent conventional surgery between 1999 and 2011 was identified for comparison of treatment outcomes.Results
Five patients with MS were managed with this strategy. Robotic subtotal cholecystectomy was successfully performed in all the patients without conversion or morbidity. When compared with a historical cohort of 17 patients who underwent surgery for MS, this group of patients had significantly less conversion and shorter hospital stay though the operation time was longer. It also showed less blood loss and less postoperative complications but these were not statistically significant.Conclusion
Mirizzi syndrome can be effectively managed with a minimally invasive approach by adopting a robot-assisted surgery together with a planned pre- and postoperative ERCP. 相似文献85.
Ryan M. Asherin Kevin D. Everhart Sunny L. Stophaeros Jo M. Vogeli Joshua Fowler Christopher J. Phiel Peter S. Kaplan 《Developmental psychobiology》2020,62(4):496-504
Polymorphisms in the oxytocin receptor gene, OXTR_rs53576, have been linked to differences in maternal sensitivity and depressive symptoms. Although some studies suggest the A allele confers risk for mood disorders, individuals homozygous for the G allele may exhibit greater sensitivity to both positive and negative social experiences, including in the mother–infant dyad. Given the bi-directional nature of mother–infant influences on maternal mood, we tested the association between both mothers’ and infants’ OXTR_rs53576 genotype and maternal depression, as assessed through a self-report inventory. Although Beck Depression Inventory (BDI-II) scores were significantly higher for GG in comparison to AG/AA mothers, and for mothers of GG in comparison to AG/AA infants, an ANCOVA revealed that after sociodemographic risk factors had been controlled, infants’, but not mothers’, OXTR genotype predicted maternal depression scores, with no significant interaction between the two. The effect of infant OXTR on maternal depression was not explained by maternal reports of difficult infant temperament. We propose that GG infants have an enhanced capacity for processing both positive and negative socially meaningful contextual information, first amplifying and then differentially perpetuating negative affectivity in mothers who exhibit depressive characteristics. 相似文献
86.
87.
Sunny Qi-Huang Fred Alejandro Loor Jacho Lisa David Ephram Weingarten 《Journal of Radiology Case Reports》2021,15(8):8
Tenosynovial chondromatosis is a rare benign disorder characterized by formation of cartilaginous bodies within the synovia of the tendon sheaths. Most commonly present in the hands and feet. Clinical presentation and plain radiography can be inconclusive, which can lead to misclassification, most often confused as a chondroma of soft parts. In this case, we report the clinical, radiologic, and histology of a 59-year-old man who presented with a 1-year history of mass on the right fifth digit with limitation of motion secondary to this condition. Surgical excision revealed multiple cartilaginous nodules of varying size arising from the flexor tendon sheath. The diagnosis was confirmed postoperatively by surgical histopathology. The postoperative course of the patient was uncomplicated and has achieved an excellent functional recovery. 相似文献
88.
Margaret L. Kaplan Gregory M. Asnis William C. Sanderson Lata Keswani Juan M. de Lecuona Sunny Joseph 《Journal of clinical psychology》1994,50(2):294-298
This study examined whether patients disclosed the same information about suicidal behaviors on a self-report instrument that they conveyed to a clinician in a face-to-face interview. The results indicated a generally high level of agreement between these two forms of suicide assessment. The one exception was the question that concerns recent suicidal ideation, where patients tended to disclose more on the self-report form. 相似文献
89.
Sara A. Wettergreen Jason Brunner Sunny A. Linnebur Laura M. Borgelt 《Medical teacher》2018,40(2):193-198
Objectives: The primary objective of this study was to compare faculty assessment and third year students' self-assessment of performance in clinical case discussions. The secondary objective was to evaluate if student characteristics influence self-assessments.Methods: This retrospective analysis compared faculty and student self-assessment scores for two clinical case discussions using Spearman’s correlation and Wilcoxon’s signed ranks test. Chi-squared test was used to compare frequency of faculty and student self-assessments indicating the highest possible rating for the pooled score and for each individual component. The pooled score included three individual components: level of engagement, quality of contribution, and professionalism.Results: Pooled faculty and student self-assessments correlated for both the first (r?=?0.41, p?0.001) and second (r?=?0.35; p?0.001) clinical case discussions. The frequency that faculty and student self-assessment ratings were the highest possible pooled score was similar for both the first (51.3% vs. 44.7%, respectively, p?=?0.25) and second (58.6% vs. 47.4%, p?=?0.05) clinical case discussions. Student characteristics (age, gender, and grade point average at graduation) did not influence self-assessments.Conclusions: Students’ self-assessment correlated with faculty assessment of performance during clinical case discussions. Increased use of self-assessments for professional development in pharmacy and other healthcare professional curricula should be considered. 相似文献
90.