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   72998篇
  免费   7143篇
  国内免费   2384篇
耳鼻咽喉   398篇
儿科学   755篇
妇产科学   470篇
基础医学   3144篇
口腔科学   4363篇
临床医学   6043篇
内科学   7636篇
皮肤病学   1162篇
神经病学   2208篇
特种医学   785篇
外国民族医学   7篇
外科学   2284篇
综合类   9172篇
现状与发展   5篇
一般理论   3篇
预防医学   4702篇
眼科学   645篇
药学   30625篇
  32篇
中国医学   3678篇
肿瘤学   4408篇
  2024年   103篇
  2023年   1256篇
  2022年   1574篇
  2021年   2570篇
  2020年   2712篇
  2019年   2960篇
  2018年   3061篇
  2017年   2998篇
  2016年   2818篇
  2015年   2763篇
  2014年   4947篇
  2013年   7618篇
  2012年   4826篇
  2011年   5096篇
  2010年   3937篇
  2009年   3602篇
  2008年   3364篇
  2007年   3388篇
  2006年   2970篇
  2005年   2686篇
  2004年   2273篇
  2003年   2077篇
  2002年   1559篇
  2001年   1528篇
  2000年   1150篇
  1999年   995篇
  1998年   857篇
  1997年   772篇
  1996年   662篇
  1995年   635篇
  1994年   540篇
  1993年   438篇
  1992年   516篇
  1991年   413篇
  1990年   343篇
  1989年   275篇
  1988年   274篇
  1987年   261篇
  1986年   203篇
  1985年   304篇
  1984年   227篇
  1983年   170篇
  1982年   153篇
  1981年   114篇
  1980年   79篇
  1979年   76篇
  1978年   85篇
  1977年   58篇
  1976年   59篇
  1975年   62篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
71.
肉毒毒素注射引起的不良反应,是药物本身的组成成分引起的与用药目的无关的有害反应,与医生注射方式和注射技术无关。尽管肉毒毒素生产厂家的药品说明书上也有提示,但其所提供的信息不够全面,也未必能引起医生的足够重视。目前文献上多为散发病例。为此作者对过去20年有关肉毒毒素注射引起的过敏反应、肉瘤样肉芽肿、眼睑水肿、流感样症状等相关不良反应的临床表现、发病机制与治疗方法进行综述。  相似文献   
72.
ObjectivesRecent evidence has shown an association between postoperative ketorolac use and anastomotic leak in patients undergoing intestinal and colorectal operations, but this relationship has been minimally explored after esophagectomy. As the use of nonopioid pain control and enhanced recovery protocols is increasingly prioritized, determination of a possible correlation between perioperative ketorolac use and leak is essential.MethodsRecords of patients undergoing esophagectomy for adenocarcinoma at a single institution from 2006 to 2018 reviewed for occurrence of anastomotic leak. Institutional pharmacy records were queried for ketorolac administration during the surgical case through the time of discharge. Multivariable logistic regression was used to determine the relationship between ketorolac administration and anastomotic leak.ResultsA total of 1019 patients met inclusion criteria, the majority of whom were male (907, 89%) with a median age of 62 years. Patients predominantly presented with locoregionally advanced disease and were treated with initial chemoradiation. Ketorolac was administered to 686 patients (67%); use was observed to increase over the study period from 49% in 2006 to 92% in 2016. Conversely, anastomotic leak occurred in 87 patients (9%) overall and decreased over time from 15% (11/72) in 2006 to 2% (2/83) in 2018. Upon multivariable analysis, neither ketorolac administration evaluated as a categoric variable (odds ratio, 0.99; P = .958) or as a continuous variable using dose (odds ratio, 1.00; P = .843) demonstrated an association with anastomotic leak.ConclusionsKetorolac in the postoperative period after esophagectomy has become an integral component of enhanced recovery pathways and does not appear to be associated with anastomotic leak.  相似文献   
73.
74.
In this paper, we report two rare cases of foreign body oral injuries caused by forks inserted tightly into both sides of the lingual interdental spaces between the mandibular deciduous canines and first deciduous molars (FDMs). These pediatric cases of foreign body insertion caused not only soft tissue injuries but also the potential luxation of affected deciduous teeth, i.e., the FDMs in the present cases, during the removal of the object by force.  相似文献   
75.
76.
77.
78.
Biologics are efficacious for treating psoriasis vulgaris (PsV) and psoriatic arthritis (PsA), but sometimes must be terminated or changed for various reasons including ineffectiveness or adverse events. To find the optimal choice of biologics for treating psoriasis, we analyzed the real‐world data on drug survival and the reason for terminating or switching biologics. Medical records from patients with PsV or PsA, who visited the Department of Dermatology, Fukuoka University Hospital from 2010 to 2017, were analyzed. Two hundred and eleven patients received biologics, and 147 patients (69.7%) were treated with only one biologic, while 64 patients (30.3%) were switched to different products. Frequently used biologics in PsV were ustekinumab (UST), infliximab and adalimumab when calculated by patient‐year. Tumor necrosis factor inhibitor (TNFi) use decreased while UST and interleukin (IL)‐17 inhibitors increased in newly introduced patients. UST showed the highest survival rate as a first‐line drug, but the advantage was lost in the second reagent's group. The major reasons for terminating/switching biologics were as follows: primary ineffectiveness (26.4%), secondary loss of efficacy (36.5%), patient's preference, including referral to nearby hospital, or stopped visiting (22.6%), side‐effects (7.7%), comorbidities (3.4%) and economic burden (2.4%). In PsA patients, TNFi are more frequently employed than in PsV patients, although switching to UST or IL‐17 inhibitors showed an increasing trend. Biologic reagents were changed mostly because of primary or secondary loss of efficacy, which affected drug survival. Further research is needed to find the optimal choice of biologics with larger samples at multiple facilities.  相似文献   
79.
80.
《Drug discovery today》2022,27(5):1210-1217
The simultaneous use of multiple medications causes drug–drug interactions (DDI) that impact therapeutic efficacy. Here, we argue that graph theory, in conjunction with game theory and ecosystem theory, can address this issue. We treat the coexistence of multiple drugs as a system in which DDI is modeled by game theory. We develop an ordinary differential equation model to characterize how the concentration of a drug changes as a result of its independent capacity and the dependent influence of other drugs through the metabolic response of the host. We coalesce all drugs into personalized and context-specific networks, which can reveal key DDI determinants of therapeutical efficacy. Our model can quantify drug synergy and antagonism and test the translational success of combination therapies to the clinic.  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