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   4000篇
  免费   178篇
  国内免费   8篇
耳鼻咽喉   15篇
儿科学   292篇
妇产科学   64篇
基础医学   480篇
口腔科学   156篇
临床医学   249篇
内科学   656篇
皮肤病学   55篇
神经病学   224篇
特种医学   104篇
外科学   582篇
综合类   93篇
一般理论   2篇
预防医学   220篇
眼科学   165篇
药学   553篇
中国医学   18篇
肿瘤学   258篇
  2023年   20篇
  2022年   68篇
  2021年   116篇
  2020年   65篇
  2019年   74篇
  2018年   97篇
  2017年   76篇
  2016年   74篇
  2015年   92篇
  2014年   158篇
  2013年   183篇
  2012年   280篇
  2011年   286篇
  2010年   158篇
  2009年   145篇
  2008年   225篇
  2007年   232篇
  2006年   176篇
  2005年   182篇
  2004年   148篇
  2003年   134篇
  2002年   122篇
  2001年   110篇
  2000年   98篇
  1999年   83篇
  1998年   31篇
  1997年   32篇
  1996年   21篇
  1995年   15篇
  1994年   12篇
  1993年   15篇
  1992年   67篇
  1991年   56篇
  1990年   58篇
  1989年   52篇
  1988年   47篇
  1987年   40篇
  1986年   53篇
  1985年   38篇
  1984年   27篇
  1983年   22篇
  1981年   13篇
  1979年   16篇
  1977年   16篇
  1976年   11篇
  1974年   17篇
  1973年   19篇
  1972年   15篇
  1970年   9篇
  1969年   10篇
排序方式: 共有4186条查询结果,搜索用时 15 毫秒
91.

Purpose

The aim of this study was to evaluate the health-related quality of life (HRQoL) in bipolar type I (BD I) and schizoaffective (SQA) patients during a 2-year period in a naturalistic study.

Methods

This study was based on the data generated by the Bipolar Comprehensive Outcome Study, a prospective, non-interventional, observational study of participants with BD I and SQA disorder. Mixed-Model Repeated Measures Analysis was used to analyze changes in the SF-36 and EQ-5D.

Results

Participants exhibited low health status at baseline with SF-36 mean scores of 46.7 ± 10.5 and 36.9 ± 12.9 (best imaginable health = 100, normal population ≈ 50) for physical and mental components, respectively. No significant differences were found between the ratings of the BD I and SQA patients on HRQoL. The SF-36 SMC improved significantly over 24 months although SPC scores remained consistent across the study. On the whole, the lowest SMC score was observed among the depressed patients (38.20), followed by the patients with a mixed state (39.01) and the manic patients (39.83).

Limitations

The observational design may have limited the causal relationships and the generalizability within the current findings.

Conclusions

HRQoL was significantly impaired in all stages of BD and SQA when compared to the general population. The impairment of HRQoL was most pronounced in the depressed state, followed by the mixed state and then the manic state. The euthymic patients showed the least impairment. In addition, patients showed a global improvement in their mental health satisfaction over the 2 years follow up period.  相似文献   
92.
93.
94.
Poor patients in developing countries may not receive permanent pacemakers (PPMs) even as lifesaving measures because of their high cost. In this report we examined whether PPMs that were explanted and donated by funeral homes in the United States could be safely and effectively reused in indigent patients in India. With permission from the deceased patients' families, 121 PPMs were explanted and donated by funeral homes for reuse. These PPMs were sterilized and sent for implantation in needy and indigent patients at a charity hospital in Mumbai, India. From the pool of donated 121 PPMs, 53 (88%, 11 single-chamber PPMs, 21%, and 42 dual-chamber PPMs, 79%) were acceptable for reuse and implanted (37 new implants, 70%, and 16 for battery/generator replacement, 30%) in 53 patients (mean ± SD 64 ± 10 years old, 28 women, 53%). Indications for PPM implantation were complete heart block (n = 27, 51%) and sick sinus syndrome (n = 26, 49%). All patients were alive and well postoperatively. No significant complications including infections or device failures occurred over 19 to 1,827 days (mean 661) of follow-up. Of 40 patients (75%) who were followed locally, 4 (10%) died because of nonpacemaker-related causes; time to death was 121 to 750 days (mean 430) after PPM implantation. All except 2 patients (5%) reported marked improvement in their symptoms. There were only 4 patients (8%) who were previously employed, and all were able to resume their manual labor work. Also, of the women, 27 patients (96%) reported improvement in symptoms enabling them to resume regular household chores as housewives after PPM implantation. In conclusion, with proper device sterilization and handling protocols, reuse of explanted PPMs in poor patients in developing countries is safe and effective. Implantation of donated PPMs can not only save lives but also improve quality of life of needy poor patients.  相似文献   
95.
96.
Congenitally missing lateral incisors are a common clinical occurrence. Dental Implants have become a primary treatment option for replacement of these teeth. Many times in prosthodontic treatment planning a multidisciplinary approach is needed for a comprehensive out come. Prosthodontic treatment planning is needed prior to the patient's consultation and following treatment acceptance; the prosthodontist may need to coordinate treatment needs with other specialists, including an orthodontist and an implant surgeon. This article describes multidisciplinary management of a case presenting with spaced maxillary anteriors due to the congenitally missing lateral incisors. Treatment consisted of initial orthodontic space management to obtain adequate space for missing lateral incisors. Single piece, narrow diameter implants were placed in edentulous spaces on both sides. Aesthetic crown lengthening procedure was performed with all anterior teeth along with tissues surrounding the implants. Metal-ceramic crowns were given as definitive restorations, resulting into an acceptable aesthetic outcome.  相似文献   
97.
98.
The burden of dengue in Nicaragua has been steadily rising during the last three decades; however, there have been few efforts to quantify the burden (measured in disability-adjusted life years [DALYs]) and cost to society. Using primary data from the Nicaraguan Ministry of Health (MINSA), the total cost and burden of dengue were calculated from 1996 to 2010. Total costs included both direct costs from medical expenditures and prevention activities and indirect costs from lost productivity. The annual disease burden ranged from 99 to 805 DALYs per million, with a majority associated with classic dengue fever. The total cost was estimated to be US$13.5 million/year (range: US$5.1–27.6 million). This analysis can help improve allocation of dengue control resources in Nicaragua and the region. As one of the most comprehensive analyses of its type to date in Nicaragua and Latin America, this study can serve as a model to determine the burden and cost of dengue.  相似文献   
99.
100.
Symptoms of mental illness can increase the risk of disturbed behaviour. Joint intervention between police and mental health services is therefore sometimes needed to manage crisis events safely, and to divert people with a mental illness from further criminal justice system contact. This study explored how crisis mental health clinicians and police officers experience the service interface to identify perceived challenges tocollaboration and possible solutions. This was explored through circulation of a developed questionnaire to staff of the Crisis Assessment Team of Alfred Psychiatry and police officers from three Melbourne police stations. In addition to identifying the high frequency of contact between interfacing services, a number of challenges to effective interface were identified. These included: inefficient communication before or following a joint event; difficulty accessing support from the interfacing service and delays in handing over care in hospital emergency departments; and staff occasionally not respecting the professional abilities of staff from interfacing services.  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