首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   14835篇
  免费   942篇
  国内免费   51篇
耳鼻咽喉   98篇
儿科学   512篇
妇产科学   474篇
基础医学   1879篇
口腔科学   218篇
临床医学   2099篇
内科学   2667篇
皮肤病学   276篇
神经病学   1610篇
特种医学   301篇
外科学   1302篇
综合类   123篇
现状与发展   1篇
一般理论   16篇
预防医学   2034篇
眼科学   336篇
药学   955篇
  1篇
中国医学   15篇
肿瘤学   911篇
  2024年   22篇
  2023年   101篇
  2022年   157篇
  2021年   359篇
  2020年   212篇
  2019年   364篇
  2018年   419篇
  2017年   273篇
  2016年   318篇
  2015年   389篇
  2014年   517篇
  2013年   791篇
  2012年   1107篇
  2011年   1174篇
  2010年   644篇
  2009年   521篇
  2008年   1037篇
  2007年   1046篇
  2006年   1049篇
  2005年   1019篇
  2004年   954篇
  2003年   908篇
  2002年   866篇
  2001年   98篇
  2000年   71篇
  1999年   102篇
  1998年   142篇
  1997年   134篇
  1996年   125篇
  1995年   121篇
  1994年   68篇
  1993年   91篇
  1992年   59篇
  1991年   54篇
  1990年   46篇
  1989年   40篇
  1988年   47篇
  1987年   31篇
  1986年   31篇
  1985年   31篇
  1984年   45篇
  1983年   38篇
  1982年   45篇
  1981年   44篇
  1980年   33篇
  1979年   13篇
  1978年   18篇
  1977年   9篇
  1976年   8篇
  1972年   6篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
71.
Abstract

This study compared symptomatological and personality differences between individuals with threshold bulimia nervosa (BN; n=39) and those with subthreshold BN (n=39) and their short-term response to a brief outpatient intervention. Participants were matched using a pairwise matching procedure, taking into account age, age of onset, and duration of the disorder. Both groups received the same brief outpatient psychoeducational therapy. The same assessment measures were used before and after treatment. With the exception of some clinical and psychopathological symptoms (higher depression and phobic anxiety in threshold BN), there were no significant between-group differences on scales of general psychopathology or personality traits. At the end of treatment, there were no significant between-group differences on abstinence rates for binge eating and vomiting, number of sessions attended, or dropout rates. Threshold BN and subthreshold BN share common psychopathological symptoms and personality traits. No differences in therapy outcome were observed for the two groups after a brief group psychoeducational intervention.  相似文献   
72.
This ethnographic study examined the symmetry (active listening)/asymmetry (dominance) of nurse-patient communication. A convenience sample of 20 gendered nurse-patient pairs from two community hospitals participated. Eleven discourse modes emerged from taped conversations between nurses and patients. In many nurse-patient interactions, nurses demonstrated symmetry; however, symmetry and asymmetry changed throughout the conversation. Nurses often missed cues that patients needed someone to listen to their concerns. Staff development implications include teaching strategies that increase symmetrical nurse-patient communication.  相似文献   
73.
74.
BackgroundThe phase II TALAPRO-1 study (NCT03148795) demonstrated durable antitumor activity in men with heavily pretreated metastatic castration-resistant prostate cancer (mCRPC). Here, we detail the safety profile of talazoparib.Patients and MethodsMen received talazoparib 1 mg/day (moderate renal impairment 0.75 mg/day) orally until radiographic progression, unacceptable toxicity, investigator decision, consent withdrawal, or death. Adverse events (AEs) were evaluated: incidence, severity, timing, duration, potential overlap of selected AEs, dose modifications/discontinuations due to AEs, and new clinically significant changes in laboratory values and vital signs.ResultsIn the safety population (N = 127; median age 69.0 years), 95.3% (121/127) experienced all-cause treatment-emergent adverse events (TEAEs). Most common were anemia (48.8% [62/127]), nausea (33.1% [42/127]), decreased appetite (28.3% [36/127]), and asthenia (23.6% [30/127]). Nonhematologic TEAEs were generally grades 1 and 2. No grade 5 TEAEs or deaths were treatment-related. Hematologic TEAEs typically occurred during the first 4-5 months of treatment. The median duration of grade 3-4 anemia, neutropenia, and thrombocytopenia was limited to 7-12 days. No grade 4 events of anemia or neutropenia occurred. Neither BRCA status nor alteration origin significantly impacted the safety profile. The median (range) treatment duration was 6.1 (0.4-24.9) months; treatment duration did not impact the incidence of anemia. Only 3 of the 15 (11.8% [15/127]) permanent treatment discontinuations were due to hematologic TEAEs (thrombocytopenia 1.6% [2/127]; leukopenia 0.8% [1/127]).ConclusionCommon TEAEs associated with talazoparib could be managed through dose modifications/supportive care. Demonstrated efficacy and a manageable safety profile support continued evaluation of talazoparib in mCRPC.ClinicalTrials.gov identifierNCT03148795  相似文献   
75.
Epigenetic therapy is emerging as a potential therapy for solid tumors. To investigate its mechanism of action, we performed integrative expression and methylation analysis of 63 cancer cell lines (breast, colorectal, and ovarian) after treatment with the DNA methyltransferase inhibitor 5-azacitidine (AZA). Gene Set Enrichment Analysis demonstrated significant enrichment for immunomodulatory pathways in all three cancers (14.4-31.3%) including interferon signaling, antigen processing and presentation, and cytokines/chemokines. Strong upregulation of cancer testis antigens was also observed. An AZA IMmune gene set (AIMs) derived from the union of these immunomodulatory pathway genes classified primary tumors from all three types into “high” and “low” AIM gene expression subsets in tumor expression data from both TCGA and GEO. Samples from selected patient biopsies showed upregulation of AIM genes after treatment with epigenetic therapy. These results point to a broad immune stimulatory role for DNA demethylating drugs in multiple cancers.  相似文献   
76.

HIV/AIDS remains a significant health threat and alcohol is a robust contributing factor. After 25 years of alcohol challenge studies investigating alcohol-related behavioral risk (ARBR), much has been learned delineating how drinking influences sexual transmission. We examine this research and consider its relevance for interventions in the era of antiretrovirals. We consider prototypic alcohol challenge methods, illustrative findings, and prevention/intervention implications, noting three perspectives: (a) scale up/extend existing interventions, including identifying under-targeted risk groups and intersecting with PrEP/PEP interventions; (b) modify existing interventions by cultivating psychoeducational content related to alcohol expectancies, alcohol myopia, sexual arousal, risk perception, sexual abdication, and condom use resistance; and (c) innovate new interventions through Science of Behavior Change approaches and repurposing ARBR paradigms. Finally, we suggest research directions concluding that until HIV incidence diminishes significantly, psychosocial interventions addressing the nexus of alcohol use, sexual transmission, and adherence to biomedical protocols will be an important priority.

  相似文献   
77.
78.
79.
Alternative approaches to the management of preterm labor have included home uterine activity monitoring, long-term tocolysis, bed rest, and intravenous hydration. Current evidence in the literature does not support improved pregnancy outcomes with these various therapies.  相似文献   
80.
Anorexia nervosa (AN) is one of the most lethal psychiatric disorders. To date, we lack adequate knowledge about the (neuro)biological mechanisms of this disorder to inform evidence-based pharmacological treatment. Gut dysbiosis is a trending topic in mental health, including AN. Communication between the gut microbiota and the brain is partly mediated by metabolites produced by the gut microbiota such as short-chain fatty acids (SCFA). Previous research has suggested a role of SCFA in weight regulation (e.g., correlations between specific SCFA-producing bacteria and BMI have been demonstrated). Moreover, fecal SCFA concentrations are reported to be altered in active AN. However, data concerning SCFA concentrations in individuals who have recovered from AN are limited. In the present study, we analyzed and compared the plasma concentrations of seven SCFA (acetic-, butyric-, formic-, isobutyric-, isovaleric-, propionic-, and succinic acid) in females with active AN (n = 109), recovered from AN (AN-REC, n = 108), and healthy-weight age-matched controls (CTRL, n = 110), and explored correlations between SCFA concentrations and BMI. Significantly lower plasma concentrations of butyric, isobutyric-, and isovaleric acid were detected in AN as well as AN-REC compared with CTRL. We also show significant correlations between plasma concentrations of SCFA and BMI. These results encourage studies evaluating whether interventions directed toward altering gut microbiota and SCFA could support weight restoration in AN.  相似文献   
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号