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   18724篇
  免费   1185篇
  国内免费   100篇
耳鼻咽喉   172篇
儿科学   493篇
妇产科学   384篇
基础医学   2134篇
口腔科学   330篇
临床医学   1539篇
内科学   3935篇
皮肤病学   232篇
神经病学   1027篇
特种医学   566篇
外科学   3294篇
综合类   656篇
一般理论   17篇
预防医学   1430篇
眼科学   506篇
药学   1872篇
中国医学   219篇
肿瘤学   1203篇
  2023年   170篇
  2022年   515篇
  2021年   651篇
  2020年   421篇
  2019年   528篇
  2018年   639篇
  2017年   445篇
  2016年   362篇
  2015年   508篇
  2014年   699篇
  2013年   872篇
  2012年   1287篇
  2011年   1265篇
  2010年   740篇
  2009年   571篇
  2008年   994篇
  2007年   993篇
  2006年   926篇
  2005年   846篇
  2004年   771篇
  2003年   694篇
  2002年   581篇
  2001年   549篇
  2000年   488篇
  1999年   394篇
  1998年   162篇
  1997年   128篇
  1996年   117篇
  1995年   121篇
  1994年   71篇
  1993年   85篇
  1992年   203篇
  1991年   189篇
  1990年   164篇
  1989年   175篇
  1988年   136篇
  1987年   154篇
  1986年   125篇
  1985年   138篇
  1984年   114篇
  1983年   91篇
  1982年   62篇
  1981年   61篇
  1979年   97篇
  1978年   64篇
  1977年   69篇
  1975年   60篇
  1974年   51篇
  1973年   54篇
  1972年   50篇
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
41.
Children with severe neurological impairment have a high incidence of respiratory problems which are multifactorial and may be related to or dependent on the underlying disability. In addition, common respiratory conditions such as asthma will be represented in this group as in the general paediatric population. In order to maximise quality of life and reduce morbidity and mortality, each child should be carefully assessed and treated, making adjustments where necessary in the treatment regime to take account of the disability.  相似文献   
42.
Glatiramer acetate is an immunomodulating drug used in the treatment of multiple sclerosis. It consists of a copolymer of amino acid residues in the same stoichiometric proportions as in myelin basic protein. Its mechanism of action is not entirely known and is probably multifaceted, with deletion of some immune cell populations and stimulation of others in these patients. Some mechanisms involve neuroprotectant effects. There is ample evidence of its efficacy in relapsing-remitting disease, using both clinical and imaging measures of disease activity, and in this paper we review the clinical and basic studies of this drug. Finally we discuss how some of its neuroprotectant effects may be useful in neurodegeneration such as is seen in more advanced cases of multiple sclerosis and other diseases such as amyotrophic lateral sclerosis and Parkinson’s disease.  相似文献   
43.
BACKGROUND: We assessed suicide and suicide attempt risk as well as symptom reduction among 3,282 depressed patients participating in duloxetine and escitalopram clinical trials assigned to either an antidepressant or placebo. METHODS: We reviewed the FDA Summary Basis of Approval reports for data regarding safety and efficacy for duloxetine and escitalopram. Furthermore, we compared suicide risk among antidepressant clinical trials in this study with our two previous analyses on seven antidepressant clinical trials. RESULTS: Suicide and suicide attempt risk varied considerably among the three analyses, showing up to ten fold differences. Interestingly, the variability exists across the three reports, rather than between treatments (antidepressants versus placebo). CONCLUSIONS: These findings suggest caution in generalizing suicide risk even from a relatively large number of participants and thus, firm conclusions can only be drawn if the number of participants is overwhelmingly large (approximately two million patients). We also noted similar magnitude of response to placebo and antidepressants among the three studies.  相似文献   
44.
Physician-generated emergency department clinical documentation (information obtained from clinician observations and summarized decision processes inclusive of all manner of electronic systems capturing, storing, and presenting clinical documentation) serves four purposes: recording of medical care and communication among providers; payment for hospital and physician; legal defense from medical negligence allegations; and symptom/disease surveillance, public health, and research functions. In the consensus development process described by Handler, these objectives were balanced with the consideration of efficiency, often evaluated as physician time and clinical documentation system costs, in recording the information necessary for their accomplishment. The consensus panel session participants and authors recommend that 1) clinical documentation be electronically retrievable; 2) selection and implementation be evidence-based and grounded on valid metrics (research is needed to identify these metrics); 3) the user interface be crafted to promote clinical excellence through high-quality information collection and efficient charting techniques; 4) the priorities for integration of clinical information be standardized and implemented within enterprises and across health and information systems; 5) systems use accepted standards for bidirectional, real-time clinical data exchange, without limiting the location or number of simultaneous users; 6) systems fully utilize existing electronic sources of specific patient information and general medical knowledge; 7) systems automatically and reliably capture appropriate data that support electronic billing for emergency department services; and 8) systems promote bedside documentation and mobile access.  相似文献   
45.
Eight cases of spinal brucellosis are included in this study. Diagnosis was established by positive serology. Back pain was the most common complaint. Functional disturbance in walking was observed in three cases; in two others this was because of impairment of cord function. Clinical hepatosplenomegaly was found in one case. Subclinical organomegaly was diagnosed in two other patients. Psoas abscess was identified by computed tomographic scan in two separate cases. Response to drug therapy and surgical decompression, when indicated, resulted in complete recovery in all patients.  相似文献   
46.
47.
48.
49.
50.
OBJECTIVES: To determine the accuracy of self-reported comorbidities compared with medical record review and the clinical and sociodemographic characteristics associated with accuracy of self-reported comorbidities. STUDY DESIGN: We conducted a prospective study of 458 newly diagnosed head and neck cancer patients using self-administered questionnaire and medical chart review data. Overall and itemwise consistency between self-report and chart review was evaluated. Social, clinical, and demographic characteristics of consistent versus inconsistent responders were analyzed. RESULTS: Seventy-four percent of patients had at least one comorbidity. There was good overall consistency between self-report and chart review (kappa = 0.50). Compared with consistent responders, inconsistent responders were found to be older (P < 0.05), have lower sleep (P < 0.05) and physical activity scores (P < 0.05), be more depressed (P < 0.05), and have more severe comorbidities (P < 0.05). CONCLUSIONS AND SIGNIFICANCE: Self-report may be considered as an alternative to chart review for comorbidity assessment in head and neck cancer patients. Younger patients, those with good general health, fewer depressive symptoms, and mild comorbidities, are more likely to give responses consistent with chart review.  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