首页 | 官方网站   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   10739篇
  免费   952篇
  国内免费   44篇
医药卫生   11735篇
  2024年   16篇
  2023年   133篇
  2022年   120篇
  2021年   508篇
  2020年   324篇
  2019年   477篇
  2018年   451篇
  2017年   357篇
  2016年   362篇
  2015年   401篇
  2014年   540篇
  2013年   607篇
  2012年   980篇
  2011年   975篇
  2010年   523篇
  2009年   375篇
  2008年   701篇
  2007年   686篇
  2006年   610篇
  2005年   649篇
  2004年   525篇
  2003年   474篇
  2002年   418篇
  2001年   55篇
  2000年   33篇
  1999年   48篇
  1998年   92篇
  1997年   69篇
  1996年   36篇
  1995年   34篇
  1994年   24篇
  1993年   23篇
  1992年   5篇
  1991年   3篇
  1990年   9篇
  1989年   4篇
  1987年   6篇
  1986年   7篇
  1985年   8篇
  1984年   6篇
  1983年   4篇
  1982年   4篇
  1981年   5篇
  1980年   3篇
  1978年   3篇
  1967年   2篇
  1934年   2篇
  1933年   2篇
  1932年   2篇
  1928年   5篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
101.
102.
Quality of Life Research - Routine Electronic Monitoring of Health-Related Quality of Life (HRQoL) (REMOQOL) in clinical care with real-time feedback to physicians could help to enhance...  相似文献   
103.
104.
Functional imaging studies in normal humans have shown that the supplementary motor area (SMA) and the primary motor cortex (PMC) are coactivated during various breathing tasks. It is not known whether a direct pathway from the SMA to the diaphragm exists, and if so what properties it has. Using transcranial magnetic stimulation (TMS) a site at the vertex, representing the diaphragm primary motor cortex, has been identified. TMS mapping revealed a second area 3 cm anterior to the vertex overlying the SMA, which had a rapidly conducting pathway to the diaphragm (mean latency 16.7 ± 2.4 ms). In comparison to the vertex, the anterior position was characterized by a higher diaphragm motor threshold, a greater proportional increase in motor-evoked potential (MEP) amplitude with voluntary facilitation and a shorter silent period. Stimulus–response curves did not differ significantly between the vertex and anterior positions. Using paired TMS, we also compared intracortical inhibition/facilitation (ICI/ICF) curves. In comparison to the vertex, the MEP elicited from the anterior position was not inhibited at short interstimulus intervals (1–5 ms) and was more facilitated at long interstimulus intervals (9–20 ms). The patterns of response were identical for the costal and crural diaphragms. We conclude that the two coil positions represent discrete areas that are likely to be the PMC and SMA, with the latter wielding a more excitatory effect on the diaphragm.  相似文献   
105.
Objective To evaluate the possibility of preservation of the larynx after neoadjuvant chemotherapy by performing a conservative surgery instead of total laryngectomy initially planned, in patients with previously untreated laryngeal and piriform sinus squamous cell carcinoma (SCC). Study Design Retrospective study. Methods A total of 115 patients treated at Tenon Hospital with induction chemotherapy from 1985 to 1995, all with initial indication of radical surgery, were available for the study. The clinical tumor response was evaluated after three cycles of chemotherapy. According to this response, to preserve laryngeal functions, some patients had a modification of the treatment initially planned: radiation therapy essentially for complete responders, and conservative surgery for some partial responders. Results Of 69 patients with laryngeal cancer, 14 were treated by partial laryngectomy and 19 by radiation therapy; of 46 patients with piriform sinus cancer, 8 were treated by partial surgery and 12 by radiation therapy; the other patients were treated as was initially planned (total laryngectomy with partial pharyngectomy). Overall survival rates, estimated by the Kaplan‐Meier method, were not statistically different between the three treatment groups. The laryngeal functions were preserved in 54% of the patients who were alive at 3 years. Conclusion This report is a retrospective study, but these results suggest the possibility of using conservative surgery, instead of initially planned total laryngectomy, for good responders to induction chemotherapy with a small residual tumor.  相似文献   
106.
Chronic hepatitis C virus (HCV) infections compromise natural killer (NK)-cell immunity. Direct-acting antivirals (DAA) effectively eliminate HCV, but the long-term effects on NK cells in cured patients are debated. We conducted a proteomic study on CD56+ NK cells of chronic HCV-infected patients before and 1 year after DAA therapy. Donor-variation was observed in NK-cell proteomes of HCV-infected patients, with 46 dysregulated proteins restored after DAA therapy. However, 30% of the CD56+ NK-cell proteome remained altered 1 year post-therapy, indicating a phenotypic shift with low donor-variation. NK cells from virus-negative cured patients exhibited global regulation of RNA-processing and pathways related to “stimuli response”, “chemokine signaling”, and “cytotoxicity regulation”. Proteomics identified downregulation of vesicle transport components (CD107a, COPI/II complexes) and altered receptor expression profiles, indicating an inhibited NK-cell phenotype. Yet, activated NK cells from HCV patients before and after therapy effectively upregulated IFN-γ and recruited CD107a. Conversely, reduced surface expression levels of Tim-3 and 2B4 were observed before and after therapy. In conclusion, this study reveals long-term effects on the CD56+ NK-cell compartment in convalescent HCV patients 1 year after therapy, with limited abundance of vesicle transport complexes and surface receptors, associated with a responsive NK-cell phenotype.  相似文献   
107.
Although consumers have made significant gains in having their voices heard in several areas within mental health, they have made less progress in being able to collaborate with their own treaters in setting treatment goals. On the basis of several years of groundwork by staff at the Connecticut Mental Health Center (CMHC), the Patient Care Committee conducted a needs assessment of providers and consumers to assess both groups' current involvement, interest in, and attitudes toward collaborative treatment planning. The results indicate that providers tend to place much of the responsibility for the difficulties in implementing collaborative treatment planning on consumers. Also, providers tend to underestimate consumers' interest in participating in this process. Implications of these findings for the development of an agency-wide training to enhance the collaborative nature of treatment planning are discussed.  相似文献   
108.
· Purpose: To evaluate whether ocular hypertensive subjects have a higher central corneal thickness than other individuals. · Methods: In this prospective study, 48 subjects with ocular hypertension, 63 patients with open-angle glaucoma, 56 nonglaucomatous patients with diabetes mellitus, and 106 control subjects were evaluated. Corneal thickness was measured by ultrasound pachymetry, and intraocular pressure was determined by Goldmann applanation tonometry. · Results: Central corneal thickness was significantly higher in the ocular hypertensive subjects, mean ±S.D., 592±39 μm, than in the patients with glaucoma (536±34 μm), the nonglaucomatous patients with diabetes mellitus (550±31 μm), and the normal subjects (545±33 μm), P<0.001. The three latter groups did not vary significantly in central corneal thickness, P>0.05. · Conclusion: In some individuals with increased transcorneal measurements of intraocular pressure, the cornea is thicker than in subjects with normal intraocular pressure readings or patients with glaucoma. It suggests that in ocular hypertensive subjects, corneal pachymetry should be performed to rule out an abnormally thick cornea as a reason for falsely high measurements of intraocular pressure. Received: 14 April 1998 Revised version received: 10 July 1998 Accepted: 23 July 1998  相似文献   
109.
Patient-based questionnaires were designed with the aim to identify and rank long-term somatic and psychosocial morbidity in patients with low-stage testicular cancer. A further intention was to compare patients' assessments with experienced doctors' general opinion on quality of life items in cured testicular cancer patients. In pilot study I, 103 tumour-free patients ranked items of physical and psychosocial morbidity after having had various kinds of treatment. Though the ranking procedure appeared to cause some difficulties amongst the patients and subsequently was abandoned, the results indicated considerable differences between the patients' and doctors' evaluations. In pilot study II patients were asked to score the different items. The questionnaire of pilot study II was completed by 107 patients from the Norwegian Radium Hospital (NRH) and 99 relapse-free patients from the Royal Marsden Hospital (RMH) with testicular cancer stage I at least 1 year after infradiaphragmatic radiotherapy (n = 94) or adjuvant chemotherapy (2 cycles,n=26), or patients who had been followed on the surveillance program (n = 86). A total of 93 doctors completed a similar questionnaire, thereby expressing their general opinion on long-term morbidity in comparable testicular cancer patients as seen during routine clinical follow-up. Both the irradiated patients and those on the surveillance program reported slight degrees of Raynaud-like phenomena, neurotoxicity and ototoxicity, most probably representing background morbidity in an age-matched general male population. Doctors tended to underestimate their patients' somatic morbidity, but often overestimated the degree of psychological distress, in particular in patients on the surveillance program. Significant differences between RMH and NRH patients with regard to sexual problems and to leisure time activity may be explained by cultural differences in the two countries. The items presented in the questionnaire used identify important issues for patients cured of testicular cancer which may be used in future multicentre trans-cultural studies assessing these patients' quality of life. This will provide sufficient data for psychometric testing and, together with the findings from patients' free comments, support the final design of a testicular cancer quality of life module.  相似文献   
110.
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-23

京公网安备 11010802026262号