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   7538篇
  免费   698篇
  国内免费   13篇
耳鼻咽喉   360篇
儿科学   483篇
妇产科学   370篇
基础医学   485篇
口腔科学   482篇
临床医学   692篇
内科学   1536篇
皮肤病学   194篇
神经病学   627篇
特种医学   273篇
外科学   1654篇
综合类   58篇
一般理论   1篇
预防医学   224篇
眼科学   251篇
药学   340篇
中国医学   26篇
肿瘤学   193篇
  2024年   21篇
  2023年   208篇
  2022年   134篇
  2021年   309篇
  2020年   223篇
  2019年   266篇
  2018年   584篇
  2017年   457篇
  2016年   586篇
  2015年   423篇
  2014年   667篇
  2013年   835篇
  2012年   720篇
  2011年   737篇
  2010年   583篇
  2009年   290篇
  2008年   236篇
  2007年   188篇
  2006年   177篇
  2005年   133篇
  2004年   64篇
  2003年   72篇
  2002年   79篇
  2001年   87篇
  2000年   57篇
  1999年   40篇
  1998年   31篇
  1997年   13篇
  1996年   5篇
  1995年   3篇
  1994年   5篇
  1993年   3篇
  1991年   1篇
  1989年   3篇
  1987年   3篇
  1985年   2篇
  1983年   1篇
  1978年   1篇
  1976年   1篇
  1928年   1篇
排序方式: 共有8249条查询结果,搜索用时 15 毫秒
51.
Rocuronium is a non-depolarizing neuromuscular blocking agent which is associated with injection pain and induces withdrawal movement of the injected hand or arm or generalized movements of the body after intravenous injection. The aim of this randomized study was to compare the efficacy of pretreatment with oral dexketoprofen trometamol (Arvelles®; Group A) with placebo (Group P) without tourniquet to prevent the withdrawal response caused by rocuronium injection. The study cohort comprised 150 American Society of Anaesthesiologists class I–III patients aged 18–75 years who were scheduled to undergo elective surgery with general anesthesia. The patients response to rocuronium was graded using a 4-point scale [0 = no response; 1 = movement/withdrawal at the wrist only, 2 = movement/withdrawal involving the arm only (elbow/shoulder); 3 = generalized response]. The overall incidence of withdrawal movement after rocuronium injection was significantly lower in Group A (30.1 %) than in Group P (64.6 %) (p < 0.001). The incidence of score 0 withdrawal movements was higher in Group A (69.9 %) than in Group P (35.4 %), that of score 1 withdrawal movements was similar between groups (Group A 21.9 %; Group B 26.1 %) (p = 0.560) and that of score 2 withdrawal movements was lower in Group A (8.2 %) than in Group P (38.5 %) (p < 0.001). There were no score 3 withdrawal movements in either group (p > 0.05). These results demonstrate that the preemptive administration of dexketoprofen trometamol can attenuate the degree of withdrawal movements caused by the pain of the rocuronium injection.  相似文献   
52.
53.
A series of new compounds containing formyl and imine group were synthesized. New formyl-substituted compounds were prepared by the reaction of 1,2-bis(bromomethyl)benzene with benzaldehyde derivatives in the presence of NaOH. New bis-crown ether imine compounds were prepared by the condensation of corresponding aldehydes with 4′-aminobenzo-15-crown-5. Sodium complexes of the bis-crown ethers form crystalline 2:1 (Na+:ligand) stoichiometries were also been synthesized. The prepared compounds were structurally confirmed by analytical and spectral data and evaluated for their antibacterial and antifungal activities. The results show that the antibacterial activity of compounds including o-methoxy group was significantly higher against S. epidermis compared to the other studied antimicrobial group.  相似文献   
54.
Kounis syndrome is a life-threatening medical condition that causes severe allergic reaction and acute coronary syndrome. Benzathine penicillin G is one of the most widely used antibiotics in clinical practice, but it can enhance both allergic and hypersensitivity complications. In this report, we describe the case of a 42-year-old man admitted to our hospital who presented with cryptic tonsillitis accompanied by angioneurotic edema, chest pain, and electrocardiographic variations. The patient was diagnosed with Kounis syndrome and treated with oral antihistamines and prednisolone. He was discharged following a complete recovery and regression of electrocardiographic abnormalities within 72 hours.  相似文献   
55.
56.
57.
58.
59.
60.
BackgroundPsoriasis is a chronic skin disease that can have severe psychosocial effects. The aim of this study was to assess the perspectives of psoriasis patients regarding their illness.MethodsOne hundred and ten psoriasis patients in the 18–65 age group were included. Data were collected via a “face to face interview” method. The questionnaire included mainly three topics (socio-demographic characteristics of patients; self-evaluations of patients about their disease; knowledge and attitudes about psoriasis).ResultsThe majority of the patients stated that psoriasis as a socially troubling disease. Almost half of them believed that “stress and unhappiness” was a predisposing factor of their illness. Belief that the occurrence of the disease was due to a contagious infectious agent was the second most frequent factor that patients emphasized. “Signs and symptoms of psoriasis” was the most frequent difficulty patients faced because of psoriasis. Most of the patients who still have their parents, those who have a closest friend in life, and more than half of the patients who have their closest friend at work all stated that there was a change in social relations, mostly arising from their counterparts. More than half of the married patients stated that there was a change in social relations, mostly arising from their spouses.ConclusionPsoriasis is more than a cosmetic nuisance and can be associated with psychosocial effects that seriously affect patients’ lives and social relations. Increasing the patients’ knowledge of the disease could have a positive effect on the relations the psoriasis patients have within their social environment.  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