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   17799篇
  免费   1569篇
  国内免费   930篇
耳鼻咽喉   161篇
儿科学   204篇
妇产科学   330篇
基础医学   2179篇
口腔科学   353篇
临床医学   2352篇
内科学   2731篇
皮肤病学   252篇
神经病学   932篇
特种医学   487篇
外国民族医学   7篇
外科学   1980篇
综合类   2627篇
现状与发展   1篇
一般理论   11篇
预防医学   985篇
眼科学   441篇
药学   1808篇
  21篇
中国医学   756篇
肿瘤学   1680篇
  2024年   219篇
  2023年   363篇
  2022年   724篇
  2021年   810篇
  2020年   641篇
  2019年   574篇
  2018年   618篇
  2017年   525篇
  2016年   478篇
  2015年   758篇
  2014年   943篇
  2013年   952篇
  2012年   1345篇
  2011年   1458篇
  2010年   918篇
  2009年   728篇
  2008年   906篇
  2007年   931篇
  2006年   884篇
  2005年   844篇
  2004年   598篇
  2003年   571篇
  2002年   416篇
  2001年   384篇
  2000年   384篇
  1999年   447篇
  1998年   271篇
  1997年   267篇
  1996年   183篇
  1995年   169篇
  1994年   136篇
  1993年   98篇
  1992年   111篇
  1991年   85篇
  1990年   75篇
  1989年   60篇
  1988年   89篇
  1987年   81篇
  1986年   46篇
  1985年   43篇
  1984年   22篇
  1983年   20篇
  1982年   14篇
  1981年   11篇
  1980年   7篇
  1979年   28篇
  1978年   9篇
  1975年   8篇
  1974年   8篇
  1972年   7篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
11.
This study examined the relationship between psychological sense of community, social‐support networks, and care‐giver stress and satisfaction among firefighters. No significant gender differences were obtained, but zero‐order correlates demonstrated significant relationships among all four variables. In examining the mediating effects of social‐support satisfaction, partial mediation for psychological sense of community on care‐giver satisfaction was determined, as well as full mediation for psychological sense of community on care‐giver stress. Therefore, firefighters who are satisfied with the support they receive may experience less stress with their care giving than those who experience low levels of support satisfaction. Future studies should assess these relationships more extensively in other areas of civic responsibility among public‐service employees to delineate effective support avenues. © 2004 Wiley Periodicals, Inc. J Comm Psychol 32: 121–126, 2004.  相似文献   
12.
Background Previous studies have noted that there is a high utilization rate of traditional Chinese medicine (TCM) services in Taiwan, China and in western countries, but few studies investigated factors associated with the utilization of TCM in Taiwan. This study analyzes the utilization rate and the factors associated with the utilization of TGM in Taiwan. Methods Data for this study were from the 2002 HPKAP Survey that conducted the face-to-face questionnaire interviews of people aged 15 years and over from October 2002 to March 2003 in Taiwan. This study analyzed the utilization of TCM outpatient services, including admission to the hospital and clinic visits. Results A total of 26 755 participants completed the survey in the six-month period. The data revealed that 10.4% of participants had utilized TCM services in the past one month while 4.2% of participants utilized TCM only (without using Western medicine outpatient services (WM) or Folk therapy (F'I')). The average visits of TCM services per patient was higher among people who had utilized TCM and FT services (2.68 visits) than among those who had utilized WM and FT services (2.15 visits) or TCM services alone (2.15 visits) during the previous one month. Younger people (odds ratio OR= 1.78, 95%C/= 1.47-2.16), women (compared with men), and people with higher education levels (OR = 1.58, 95%CI =1.25-1.98) were more likely to visit TCM than compared groups. People with self-reported poor health status (OR = 2.07,95%CI = 1.76-2.44) and people who exercise regularly (OR = 1.17, 95%CI = 1.07-1.27) had higher ORs to visit TCM service than comparison group.Conclusions There is a high utilization of TCM in Taiwan. Further studies are needed to investigate the related factors and determinants between the utilization of TCM and the utilization of FT in Taiwan.  相似文献   
13.
目的 观察腹腔镜胆囊切除术 (LaparoscopicCholecystectomy ,L .C)后钛夹在腹腔内异位。方法 前瞻性对2 0 0 2年 1~ 5月间 6 0例L .C病人进行追踪观察临床表现 ,采用B超、腹部X线检查等方法 ,观察钛夹位置的变化与肝外胆管的关系。结果  6 0例L .C后病人中 5例钛夹发生位置改变。结论 ①钛夹在体内 ,对胆道无压迫、无胆漏 ;②观察钛夹异位 ,以采用B超为最简单、经济的方法。  相似文献   
14.
Over a 2-year period we have identified pollen grains from 48 families of grasses, as well as mould spores and mite particles during air sampling in Guangxi Province. The major aeroallergens were Artemisia, Moraceae and Euophoribiacea, and the spores of Aspergillus, Penicillinum, Cephalosporium and Helminthosporium. Mites were probably also one of the major outdoor aeroallergens. Our investigations also included inspection of the vegetation of the geographical area involved, as well as skin testing on 774 subjects using extracts of 37 aeroallergens. We believe that this work has provided fundamental information on seasonal allergy in Southern China and South-east Asia.  相似文献   
15.
目的 分析中学生自我差异与心理健康的关系。方法 采用自行修订的自我差异量表和SCL—90对500名中学生进行调查。结果 初中生现实自我与理想自我的差异(AI)和现实自我与应该自我的差异(AO)这两类自我差异分数都显著高于高中生。中学生两类自我差异各因子与心理健康各因子之间都显著相关(P〈0.05)。AI道德自我差异对初中生的心理健康有预测作用;AI心理自我差异与AI自我认同差异对高中生的心理健康有预测作用。结论 应针对中学生的心理特点,提高其对自我的认识,减少诱发心理问题的因素,促进中学生心理健康。  相似文献   
16.
Lung cancer and prior tuberculosis infection in Shanghai   总被引:1,自引:0,他引:1  
In a population-based case-control study of lung cancer in Shanghai involving interviews during 1984-86 with 1,405 cancer patients and 1,495 controls, a significant 50% elevation in the risk of lung cancer, adjusted for cigarette smoking, was observed among persons who had a history of tuberculosis. Among those diagnosed with tuberculosis within the past 20 years, the risk exceeded 2.5-fold. In males the lung cancers tended to occur on the same side as the previous tuberculosis infection. For both sexes, the effect of recent tuberculosis was most apparent for adenocarcinoma and peripheral tumours. No relationship was found between lung cancer risk and the type of tuberculosis therapy, including use of isoniazid. The findings suggest that tuberculosis may predispose to lung cancer, with the association most apparent among recent survivors of the infection.  相似文献   
17.
Sympathetic skin response (SSR) and R–R interval variation (RRIV) were studied in 36 chronic, nondiabetic uremics to compare with their nerve conduction studies (NCS) and clinical dysautonomia. Abnormal SSR was noted in 5 (13.9%) patients, abnormal RRIV in 14 (38.9%), and abnormal NCS in 26 (72.2%). The patients were classified into three groups: group (GP) 1: “normal,” n = 21 (58.3%), normal RRIV and SSR; GP 2: “isolated parasympathetic dysfunction,” n = 10 (27.8%), abnormal RRIV and normal SSR; and GP 3: “sympathetic sudomotor dysfunction,” n = 5 (13.9%), abnormal SSR. A significant difference in age was found among the three groups (GP 3 > GP 2 > GP 1; P < 0.0001, ANOVA). After controlling the age factor, we still noted a tendency toward increasing NCS disturbances (distal latency and nerve conduction velocity of peroneal nerve; P < 0.05, multiple regression analysis) and frequencies of clinical autonomic symptoms (postural dizziness and impotence; P < 0.05, Mantel–Hanszel test) from GP 1 to GP 3. Patients with abnormal SSR (GP 3) displayed significantly higher frequencies of postural dizziness and impotence, indicating the relationship between an absence of SSR and clinical dysautonomia. © 1994 John Wiley & Sons, Inc.  相似文献   
18.
目的:分析肾移植后免疫抑制剂对长期存活的影响,寻找移植后不同时间合适的免疫抑制用药方案及其用药剂量。 方法:对肾移植一年以上、肾功能正常的497例患者进行5年连续随访。根据移植后2、3、5年的不同免疫抑制用药将患者分为三联、二联、传统二联治疗三组。统计各组的排异发生率,排异和无排异患者免疫抑制用药的种类、剂量及CsA浓度,对排异患者追踪排异发生前12个月内的药物更动情况。 结果:肾移植后2、3、5  相似文献   
19.
枸橼酸抗凝血液透析   总被引:5,自引:0,他引:5  
研究解剖高危出血患者血液透析的抗凝方法-局部枸橼酸抗凝的临床应用和疗效。方法:采用1.6mol/L的枸橼酸钠、空心纤维透析器和普通含钙碳酸氢盐透析,观察RCA透析对患者出血、体外循环凝血、血游离钙、总钙、K^+,Na^+,pH,HCO^-3,Scr,BUN及血清枸橼酸浓度的影响。  相似文献   
20.
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