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   3478篇
  免费   262篇
  国内免费   12篇
耳鼻咽喉   15篇
儿科学   112篇
妇产科学   93篇
基础医学   493篇
口腔科学   51篇
临床医学   399篇
内科学   661篇
皮肤病学   52篇
神经病学   350篇
特种医学   107篇
外科学   406篇
综合类   38篇
一般理论   2篇
预防医学   586篇
眼科学   37篇
药学   160篇
中国医学   19篇
肿瘤学   171篇
  2023年   39篇
  2022年   61篇
  2021年   137篇
  2020年   61篇
  2019年   91篇
  2018年   120篇
  2017年   78篇
  2016年   70篇
  2015年   79篇
  2014年   89篇
  2013年   160篇
  2012年   219篇
  2011年   199篇
  2010年   118篇
  2009年   101篇
  2008年   164篇
  2007年   174篇
  2006年   162篇
  2005年   144篇
  2004年   129篇
  2003年   112篇
  2002年   119篇
  2001年   68篇
  2000年   56篇
  1999年   58篇
  1998年   32篇
  1997年   34篇
  1996年   30篇
  1995年   23篇
  1994年   28篇
  1993年   19篇
  1992年   50篇
  1991年   51篇
  1990年   40篇
  1989年   50篇
  1988年   37篇
  1987年   33篇
  1986年   24篇
  1985年   36篇
  1984年   16篇
  1983年   16篇
  1982年   18篇
  1981年   14篇
  1980年   16篇
  1979年   28篇
  1977年   22篇
  1972年   21篇
  1971年   15篇
  1968年   15篇
  1966年   12篇
排序方式: 共有3752条查询结果,搜索用时 15 毫秒
91.
92.
93.
The in vitro susceptibility of dermatophytes to the azole antifungals itraconazole, fluconazole and ketoconazole was evaluated by broth macro and microdilution methods, according to recommendations of the CLSI, with some adaptations. Twenty nail and skin clinical isolates, four of Trichophyton mentagrophytes and 16 of T. rubrum were selected for the tests. Itraconazole minimal inhibitory concentrations (MIC) varied from < 0.03 to 0.25 microg/mL in the macrodilution and from < 0.03 to 0.5 microg/mL in the microdilution methods; for fluconazole, MICs were in the ranges of 0.5 to 64 microg/mL and 0.125 to 16 microg/mL by the macro and microdilution methods, respectively, and from < 0.03 to 0.5 microg/mL by both methods for ketoconazole. Levels of agreement between the two methods (+/- one dilution) were 70% for itraconazole, 45% for fluconazole and 85% for ketoconazole. It is concluded that the strains selected were inhibited by relatively low concentrations of the antifungals tested and that the two methodologies are in good agreement especially for itraconazole and ketoconazole.  相似文献   
94.
95.
Cellular and molecular mechanisms involved in the generation of seizures and the magnitude of neural cells injury are not fully understood. We evaluated astrocyte and/or neuronal injury in rats in the pentylenetetrazol model of acute seizures by measuring S100B and NSE levels in cerebrospinal fluid. Additionally, we determined ADP and GDP hydrolysis by soluble nucleoside triphosphate diphosphohydrolase in the cerebrospinal fluid, and the concentration of nucleosides adenosine, inosine and guanosine as putative markers of brain injury. After pentylenetetrazol-induced seizures: (i) S100B values increased from 10 to 30 min, returning to control levels at 24 h; NSE levels presented a biphasic increase: an increase at 10 to 30 min returning to control levels, and again at 240 min followed by a decline at 24 h; (ii) nucleotidase activities increased from 10 min, returning to control levels at 240 min; (iii) guanosine and inosine levels increased exclusively after 30 min. In summary, this study showed biochemical changes in the cerebrospinal fluid occurring after seizures induced by pentylenetetrazol. Such events may have a modulating effect upon seizure expression, particularly nucleoside triphosphate diphosphohydrolase activities and nucleoside concentrations, but are nevertheless followed by neural death as evidenced by the increase in NSE and S100B levels.  相似文献   
96.
Babikian S  Emerson L  Wynn GH 《Military medicine》2007,172(11):1213-1216
A 22-year-old active duty E1 Nepalese male who recently emigrated from Nepal suddenly exhibited strange behaviors and mutism during Advanced Individual Training. After receiving care from a hospital near his unit, he was transferred to Walter Reed Army Medical Center Inpatient Psychiatry for further evaluation and treatment. Although he was admitted with a diagnosis of psychosis not otherwise specified (NOS), after consideration of cultural factors and by ruling out concurrent thought disorder, a diagnosis of selective mutism was made. To our knowledge this is the first reported case of selective mutism in a soldier. This case serves as a reminder of the need for cultural awareness during psychological evaluation, diagnosis, and treatment of patients.  相似文献   
97.
OBJECTIVE: To compare the findings of the Useful Field of View (UFOV) test with those of conventional neuropsychologic tests to determine the utility of the UFOV test as a measure of attention in a population with brain injury. DESIGN: Cohort study. SETTING: Freestanding rehabilitation hospital. PARTICIPANTS: Fifteen inpatients with severe brain injury. INTERVENTIONS: Not applicable. MAIN OUTCOME MEASURES: UFOV test, FIM\T instrument, length of stay (LOS), and standard neuropsychologic testing. RESULTS: The UFOV subtest UF2 correlated strongly with the other 2 subtests, UF1 and UF3. The UF2 subtest correlated most strongly with paper and pencil tests of visual attention. The UF2 predicted 52% of the FIM change and 60% of the LOS variance, second only to admission FIM score, which predicted 75% and 80% of FIM change and LOS variance, respectively. CONCLUSIONS: Among the patients in our study, the UFOV test can be used to determine the visual divided attention of patients with acquired brain injury. The results also showed that the UFOV test correlated with LOS and FIM change in patients with acquired brain injury recovering in a rehabilitation facility. Because the UFOV test is much more quickly administered and scored than other measures of attention and divided attention, these results suggest that the UFOV test may provide an easy means to measure a critical variable in the population with head injury.  相似文献   
98.
Changes in house design reduce exposure to malaria mosquitoes   总被引:3,自引:0,他引:3  
House design may affect an individual's exposure to malaria parasites, and hence to disease. We conducted a randomized-controlled study using experimental huts in rural Gambia, to determine whether installing a ceiling or closing the eaves could protect people from malaria mosquitoes. Five treatments were tested against a control hut: plywood ceiling; synthetic-netting ceiling; insecticide-treated synthetic-netting ceiling (deltamethrin 12.5 mg/m2); plastic insect-screen ceiling; or the eaves closed with mud. The acceptability of such interventions was investigated by discussions with local communities. House entry by Anopheles gambiae, the principal African malaria vector, was reduced by the presence of a ceiling: plywood (59% reduction), synthetic-netting (79%), insecticide-treated synthetic-netting (78%), plastic insect-screen (80%, P < 0.001 in all cases) and closed eaves (37%, ns). Similar reductions were also seen with Mansonia spp., vectors of lymphatic filariasis and numerous arboviruses. Netting and insect-screen ceilings probably work as decoy traps attracting mosquitoes into the roof space, but not the room. Ceilings are likely to be well accepted and may be of greatest benefit in areas of low to moderate transmission and when used in combination with other malaria control strategies.  相似文献   
99.
Access to mental health care is a considerable problem for individuals suffering from a mental illness. Of the 44.7 million adults, aged 18 or older, experiencing a mental illness in 2016 only 43.1% reported receiving treatment. Utilizing integrated and collaborative models can enhance identification and treatment for individuals in need of mental health. The purpose of this paper is threefold: (a) to describe the process of implementing hybrid-collaborative care model (hybrid-CCM) in a practice setting, (b) to discuss the similarities and differences in a hybrid-CCM when compared to a traditional collaborative care model, and (c) to discuss practical considerations for nurse practitioners fulfilling the psychiatric consultant role in a hybrid-CCM or traditional collaborative care model. Implementing collaborative care presents challenges. Understanding implementation efforts can enhance the adoption of collaborative types of care and likely enhance the effectiveness of these strategies. Nurse practitioners can serve as psychiatric consultants within these delivery models, but appropriate training should take place prior to doing so to ensure they are prepared to fulfill this role. Continuing to identify ways we can expand implementation of collaborative models or hybrid versions of collaborative care models need to be explored.  相似文献   
100.
The purpose of this study was to assess the prevalence and correlates of comorbid diabetes and Post-Traumatic Stress disorder(PTSD)and potential relationships between PTSD and diabetes outcomes. Male patients enrolled in a VA primary care database (N = 73,270) were classified as having diabetes from pharmacy records (N = 14,438) and grouped into those with diagnoses of PTSD with depression (N = 649), PTSD-only (N = 480), Depression-only (N = 1696), Other psychiatric diagnosis (N = 736), or No psychiatric diagnosis (N = 10,877) based on the Purpose of Visit diagnoses in the medical record. Outcomes included glycemic control (HbA1c), cholesterol and tryglycerides. Correlates were age, substance use disorder, other psychiatric diagnosis, number of primary care encounters, and medications. The prevalence of comorbid diabetes and PTSD was 8% (n = 1129). Of these, 57% (n = 649) had comorbid depression. Patients with PTSD and depression had higher rates of substance use disorder and higher cholesterol and LDL. Patients with depression had poorer glycemic control. Patients with PTSD and depression weighed more and had higher BMI than patients with neither diagnosis. Thus, male diabetes patients with PTSD and depression may be vulnerable to substance use disorders and to weight/lipid problems that can affect health. Depression is a likely contributor to poor glycemic control. Careful screening for mental health comorbidities is needed for diabetes patients.  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