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   67666篇
  免费   8656篇
  国内免费   1709篇
耳鼻咽喉   286篇
儿科学   1344篇
妇产科学   1180篇
基础医学   3711篇
口腔科学   2919篇
临床医学   10148篇
内科学   8085篇
皮肤病学   1133篇
神经病学   3592篇
特种医学   1011篇
外国民族医学   12篇
外科学   6557篇
综合类   10831篇
现状与发展   7篇
一般理论   26篇
预防医学   6303篇
眼科学   911篇
药学   8859篇
  478篇
中国医学   6529篇
肿瘤学   4109篇
  2024年   210篇
  2023年   1615篇
  2022年   2015篇
  2021年   4123篇
  2020年   4321篇
  2019年   3422篇
  2018年   3198篇
  2017年   3482篇
  2016年   3314篇
  2015年   2904篇
  2014年   5308篇
  2013年   5993篇
  2012年   4357篇
  2011年   4394篇
  2010年   3453篇
  2009年   3104篇
  2008年   3040篇
  2007年   3054篇
  2006年   2705篇
  2005年   2274篇
  2004年   1912篇
  2003年   1654篇
  2002年   1327篇
  2001年   1042篇
  2000年   846篇
  1999年   666篇
  1998年   574篇
  1997年   498篇
  1996年   413篇
  1995年   330篇
  1994年   338篇
  1993年   219篇
  1992年   253篇
  1991年   216篇
  1990年   196篇
  1989年   189篇
  1988年   167篇
  1987年   149篇
  1986年   106篇
  1985年   131篇
  1984年   106篇
  1983年   68篇
  1982年   60篇
  1981年   61篇
  1980年   53篇
  1979年   40篇
  1978年   22篇
  1977年   21篇
  1976年   22篇
  1975年   28篇
排序方式: 共有10000条查询结果,搜索用时 78 毫秒
101.
102.
Postoperative pulmonary complications are associated with an increase in mortality, morbidity and healthcare utilisation. The Agency for Healthcare Research and Quality recommends risk assessment for postoperative respiratory complications in patients undergoing surgery. In this hospital registry study of adult patients undergoing non-cardiac surgery between 2005 and 2017 at two independent healthcare networks, a prediction instrument for early postoperative tracheal re-intubation was developed and externally validated. This was based on the development of the Score for Prediction Of Postoperative Respiratory Complications. For predictor selection, stepwise backward logistic regression and bootstrap resampling were applied. Development and validation cohorts were represented by 90,893 patients at Partners Healthcare and 67,046 patients at Beth Israel Deaconess Medical Center, of whom 699 (0.8%) and 587 (0.9%) patients, respectively, had their tracheas re-intubated. In addition to five pre-operative predictors identified in the Score for Prediction Of Postoperative Respiratory Complications, the final model included seven additional intra-operative predictors: early post-tracheal intubation desaturation; prolonged duration of surgery; high fraction of inspired oxygen; high vasopressor dose; blood transfusion; the absence of volatile anaesthetic use; and the absence of lung-protective ventilation. The area under the receiver operating characteristic curve for the new score was significantly greater than that of the original Score for Prediction Of Postoperative Respiratory Complications (0.84 [95%CI 0.82–0.85] vs. 0.76 [95%CI 0.75–0.78], respectively; p < 0.001). This may allow clinicians to develop and implement strategies to decrease the risk of early postoperative tracheal re-intubation.  相似文献   
103.
104.
肌萎缩侧索硬化症(ALS)是一种常见的上、下运动神经元同时损害的一种疾病,临床常见肢体无力、肌肉萎缩等症状。属中医学“痿证”范畴,本例验案患者双上肢及左下肢活动无力伴肌肉萎缩2年余,加重半年,伴随肌张力增高、反射亢进等症状,辨证属肝肾亏虚型痿证,临床以针刺治疗为主,配合静脉注射、穴位注射以补益肝肾,养血柔筋,疗效显著。  相似文献   
105.
106.
分析温病学术理论发展与温病学教学、临床应用现状,认为有关温病文献研究可从深度与广度进行再拓展、再挖掘。介绍"扎根理论"研究方法,结合温病学科学术性质及特点,探讨"扎根理论"在该学科学术理论建设中可行的研究模式与研究思路,剖析该研究对于温病学科学术建设的理论价值及应用前景。同时,基于"扎根理论"研究难点,提出研究过程中需注意的问题。  相似文献   
107.
Objective: A multidisciplinary vocational rehabilitation programme, the Vocational Enablement Protocol (VEP) was developed to address the specific needs of employees with hearing difficulties. In the current study we evaluated the process of implementing the VEP in audiologic care among employees with hearing impairment. Design: In conjunction with a randomized controlled trial, we collected and analysed data on seven process parameters: recruitment, reach, fidelity, dose delivered, dose received and implemented, satisfaction, and perceived benefit. Study sample: Sixty-six employees with hearing impairment participated in the VEP. The multidisciplinary team providing the VEP comprised six professionals. Results: The professionals performed the VEP according to the protocol. Of the recommendations delivered by the professionals, 31% were perceived as implemented by the employees. Compliance rate was highest for hearing-aid uptake (51%). Both employees and professionals were highly satisfied with the VEP. Participants rated good perceived benefit from it. Conclusions: Our results indicate that the VEP could be a useful treatment for employees with hearing difficulties from a process evaluation perspective. Implementation research in the audiological setting should be encouraged in order to further provide insight into parameters facilitating or hindering successful implementation of an intervention and to improve its quality and efficacy.  相似文献   
108.
2‐deoxy D‐glucose (2DG) was tested for efficacy in treating alopecia areata using the C3H/HeJ skin graft model. 2DG has proven to be efficacious in treatment of various mouse models of autoimmunity with minimal serious side effects noted. This agent has been shown to normalize abnormally activated T‐cell populations while also preventing cell surface expression of NKG2D; key factors defining alopecia areata disease progression. Daily oral ingestion of 2DG via drinking water to mice with patchy or diffuse alopecia areata for 16 weeks failed to prevent expansion of alopecia or cause regrowth of hair in treated mice. Histologically, there were no differences between treated and control groups. These results indicate that, while 2DG is effective for some autoimmune diseases, it was not efficacious for the cell‐mediated autoimmune mouse disease, alopecia areata.  相似文献   
109.
随着对于双心疾病研究的加深,西医疗法的弊端也开始显现。而中医因其理论架构中早就有对于“心主血脉”和“心主神明”的认识,因此在双心疾病的治疗上有着先天的优势。同时近些年中医疗法的结合应用也取得不错的成绩,本文通过对于双心疾病的病例分析,来研讨这种治疗手段的合理性和先进性。  相似文献   
110.
目的探讨紫杉醇联合卡铂化疗治疗卵巢癌的效果分析。方法选自2018年5月-2019年5月132名符合入组以及排除标准的患者,随后研究人员将患者分为对照组以及研究组,分组应按照科学、合理、随机的标准,两组患者分别均有67例,对照组患者按照研究要求,接受卡铂化疗治疗,研究组患者按照研究要求,接受紫杉醇联合卡铂化疗治疗,两组患者分别接受不同的治疗,评估患者的临床效果,对比两组患者的观察指标,如:T细胞亚群、临床疗效。结果治疗后,CD8、CD4、CD3、CD4/CD8,研究组高于对照组;研究组中,CR+PR+SD人数多于对照组患者,且治疗总有效率高于对照组患者(P<0.05)。结论紫杉醇联合卡铂化疗治疗卵巢癌,能够提升患者自身的免疫功能,促进疾病的好转。  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