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   1246篇
  免费   189篇
  国内免费   10篇
耳鼻咽喉   16篇
儿科学   108篇
妇产科学   22篇
基础医学   143篇
口腔科学   41篇
临床医学   198篇
内科学   269篇
皮肤病学   9篇
神经病学   93篇
特种医学   167篇
外科学   146篇
综合类   52篇
预防医学   62篇
眼科学   2篇
药学   54篇
中国医学   5篇
肿瘤学   58篇
  2022年   3篇
  2021年   19篇
  2020年   12篇
  2019年   12篇
  2018年   40篇
  2017年   46篇
  2016年   41篇
  2015年   46篇
  2014年   40篇
  2013年   71篇
  2012年   38篇
  2011年   48篇
  2010年   63篇
  2009年   64篇
  2008年   40篇
  2007年   47篇
  2006年   39篇
  2005年   22篇
  2004年   26篇
  2003年   21篇
  2002年   20篇
  2001年   25篇
  2000年   14篇
  1999年   11篇
  1998年   62篇
  1997年   55篇
  1996年   57篇
  1995年   52篇
  1994年   31篇
  1993年   41篇
  1992年   28篇
  1991年   23篇
  1990年   28篇
  1989年   18篇
  1988年   29篇
  1987年   26篇
  1986年   22篇
  1985年   14篇
  1984年   20篇
  1983年   20篇
  1982年   7篇
  1981年   21篇
  1980年   14篇
  1979年   14篇
  1978年   9篇
  1977年   11篇
  1976年   12篇
  1975年   10篇
  1971年   4篇
  1966年   2篇
排序方式: 共有1445条查询结果,搜索用时 171 毫秒
1.
Benign intracranial hypertension (BIH) is reported in three children from Australia and one from New Zealand, who were being treated with recombinant human growth hormone (rhGH). Three males and one female, aged between 10.5 and 14.2 y, developed intracranial hypertension within 2 weeks to 3 months of starting treatment. A national database, OZGROW, has been prospectively collecting data on all 3332 children treated with rhGH in Australia and New Zealand from January 1986 to 1996. The incidence of BIH in children treated with growth hormone (GH) is small, 1.2 per 1000 cases overall, but appears to be greater with biochemical GHD (<10IUml -1), i.e. 6.5/1000 (3 in 465 cases), relative risk 18.4, 95% confidence interval 1.9-176.1, than in all other children on the database. The incidence in patients with Turner's syndrome was 2.3/1000 (1 in 428 cases). No cases in patients with partial GHD (10–20 IUml -1) or chronic renal failure were identified. Possible causative mechanisms are discussed. The authors'practice is now to start GH replacement at less than the usual recommended dose of 14IUm-2 week-1 in those children considered to be at high risk of developing BIH. Ophthalmological evaluation is recommended for children before and during the first few months following commencement of rhGH therapy and is mandatory in the event of peripheral or facial oedema, persistent headaches, vomiting or visual symptoms. The absence of papilledema does not exclude the diagnosis.  相似文献   
2.
In a prospective, randomized, double-blind study, 49 patients underwent lumbar myelography using iotrol (24 patients) or metrizamide (25 patients). The diagnostic imaging adequacy of iotrol was comparable with that of metrizamide. After iotrol myelography, adverse reactions were fewer, less severe, and of shorter duration than were those following metrizamide myelography. Thirteen of 24 patients (54%) receiving iotrol reported some adverse reactions compared with 24 of 25 patients (96%) receiving metrizamide. Five moderate and one severe adverse reaction occurred in the group receiving iotrol. Fourteen moderate and eight severe adverse reactions occurred in the group receiving metrizamide. Thirty-eight patients underwent electroencephalography both before and after myelography (19 iotrol and 19 metrizamide). None of the EEGs obtained after iotrol myelography changed from baseline, while seven of the EEGs obtained after metrizamide myelography showed changes from baseline. Iotrol was judged superior to metrizamide as a contrast medium in this patient population.  相似文献   
3.
Bottomley  PA; Lee  Y; Weiss  RG 《Radiology》1997,204(2):403
  相似文献   
4.
5.
目的研究臂丛神经损伤膈神经移位术对青壮年患者早期呼吸功能的影响.方法对16例接受膈神经移位治疗的患者,在术前、术后(10 d)进行肺功能指标的比较,同时定期进行门诊随访,观察呼吸系统自觉症状程度.结果13例术后出现了不同程度的供氧不足症状,16例全部出现一侧膈肌抬高,术后第10天肺活量(VC)、肺活量预计值百分数(VC%)分别比术前减少37.98%和26.88%,两者差异有统计学意义(tvc=11.532、tvc%=0,P<0.01).其它项目如残气量(RV)较术前轻度下降,肺总量(TLC)下降值达到术前肺总量的36.49%,残气量/肺总量比值(RV/TLC%)较术前上升了4.75%,上述各指标的差值均有统计学意义.1 s用力呼气量/用力肺活量比值(FEV1/FVC)和术前比基本无改变,但其差值有统计学意义.膈神经移位右侧(10例)与左侧(6例)术前、术后肺活量比较差异有统计学意义.术后随访8个月~2年,所有患者均无明显呼吸困难和胸闷等症状.结论膈神经移位术后对青壮年患者肺容量有较大的丧失,肺通气功能减弱和小气道阻力增加,但其丧失程度在机体自身代偿耐受范围内,不会导致急剧发生的严重呼吸功能障碍.建议对右侧臂丛神经根性损伤的患者,术前进行严格的肺、心功能检查,避免发生较为严重的并发症.  相似文献   
6.
Interest in developing support services for the long-term mentally ill has increased in recent years. One of the most important aspects of support essential to the basic community survival of the chronic patient is income maintenance. Unfortunately, support in this area has been declining for this population. The purpose of this paper is to briefly outline the decline in the overall well-being of patients who rely on social assistance, describe a model income maintenance program established in a provincial psychiatric hospital, and, to evaluate the program's success in alleviating the financial problems of the long-term mentally ill. The income maintenance program described has proven to be a successful method of improving the economic situation of the long-term mentally ill. In its first 30 months of operation, the income status of over 3,000 patients has been systematically reviewed and 77% of those eligible have been converted to higher social assistance rates. The conversion has resulted in a 30 to 40% increase in income for the patients involved. The program has also contributed to improved relations with hospital staff and social assistance offices.  相似文献   
7.
8.
9.
Chronic low back pain: comparison of bone SPECT with radiography and CT   总被引:1,自引:0,他引:1  
Ryan  PJ; Evans  PA; Gibson  T; Fogelman  I 《Radiology》1992,182(3):849
  相似文献   
10.
This article examines the outcomes of participation in mental health Consumer/Survivor Initiatives (CSIs) and identifies helpful qualities of CSIs through a longitudinal, qualitative study that involved in‐depth interviews of people who experienced severe mental health challenges in Ontario, Canada. We used a nonequivalent control group design in which we compared active participants in CSIs ( n = 15) with nonactive participants ( n = 12) at baseline and at 9‐ and 18‐month follow‐up intervals. Compared with non‐CSI participants, CSI participants reported more stable mental health, enhanced social support, sustained work, stable income, and participation in education and training at 9‐ and 18‐month interviews. The helpful qualities of CSIs that participants reported were (1) safe environments that provide a positive, welcoming place to go; (2) social arenas that provide opportunities to meet and talk with peers; (3) an alternative worldview that provides opportunities for members to participate and contribute; and (4) effective facilitators of community integration that provide opportunities to connect members to the community at large. The findings are discussed in terms of previous research in self‐help and consumer‐run organizations in mental health. © 2006 Wiley Periodicals, Inc.  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