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   3129篇
  免费   177篇
  国内免费   7篇
耳鼻咽喉   4篇
儿科学   84篇
妇产科学   30篇
基础医学   454篇
口腔科学   132篇
临床医学   239篇
内科学   282篇
皮肤病学   426篇
神经病学   140篇
特种医学   330篇
外国民族医学   11篇
外科学   693篇
综合类   68篇
一般理论   1篇
预防医学   126篇
眼科学   33篇
药学   132篇
中国医学   3篇
肿瘤学   125篇
  2021年   42篇
  2020年   22篇
  2019年   36篇
  2018年   45篇
  2017年   42篇
  2016年   47篇
  2015年   84篇
  2014年   71篇
  2013年   109篇
  2012年   135篇
  2011年   134篇
  2010年   104篇
  2009年   80篇
  2008年   146篇
  2007年   140篇
  2006年   137篇
  2005年   141篇
  2004年   120篇
  2003年   102篇
  2002年   125篇
  2001年   83篇
  2000年   104篇
  1999年   88篇
  1998年   48篇
  1997年   60篇
  1996年   55篇
  1995年   39篇
  1994年   32篇
  1993年   34篇
  1992年   60篇
  1991年   67篇
  1990年   45篇
  1989年   60篇
  1988年   55篇
  1987年   69篇
  1986年   69篇
  1985年   55篇
  1984年   49篇
  1983年   32篇
  1982年   29篇
  1981年   36篇
  1980年   26篇
  1979年   36篇
  1978年   34篇
  1977年   17篇
  1976年   21篇
  1975年   14篇
  1974年   16篇
  1973年   14篇
  1972年   18篇
排序方式: 共有3313条查询结果,搜索用时 15 毫秒
81.

Background

Tumors of the upper extremity are common and mostly benign. However, the prevalence of discordant diagnosis of a solid hand tumor is less studied. The objectives of this retrospective study were (1) to determine the proportion of patients with a different (discrepant or discordant) pathological diagnosis compared to the preoperative diagnosis, (2) to determine the prevalence of the types of pathologies encountered at excisional biopsy for suspected benign tumors, and (3) to determine the types of tumors diagnosed when the surgeon does not make a preoperative diagnosis.

Methods

One hundred and eighty-two suspected benign soft tissue tumors of the upper extremity with a preoperative diagnosis other than ganglion cyst were excised by one of three surgeons over a 10-year period. A preoperative diagnosis was applied for 125 tumors. No preoperative imaging was used.

Results

Only 26 of the 125 tumors (21 %) with a preoperative diagnosis were discrepant. The tumors that were most likely to have a discrepant diagnosis were vascular tumors (32 %) and other less common benign tumors (33 %). Among the entire cohort of 182 tumors, lipomas (19 %), giant cell tumors of tendon sheath (GCTTS; 19 %), and vascular tumors (16 %) were the most frequent pathological diagnoses. Among the 57 tumors that did not have a preoperative diagnosis, most were vascular tumors (23 %), fibromas (14 %), and GCTTS (11 %). One tumor without a preoperative diagnosis was a malignant tumor, but we consider this unusual and possibly spurious.

Conclusions

A hand surgeon’s preoperative diagnosis without imaging is usually correct prior to excision of a mass in the hand. Discrepant diagnoses are usually benign and do not alter treatment. Level of evidence: Prognostic II  相似文献   
82.

Background

There is a need to determine the difference in response to mail, e-mail, and phone in clinical research surveys.

Methods

We enrolled 150 new and follow-up patients presenting to our hand and upper extremity department. Patients were assigned to complete a survey by mail, e-mail, or phone 3 months after enrollment, altering the follow-up method every 5 patients, until we had 3 groups of 50 patients. At initial enrollment and at 3 month follow-up (range 2–5 months), patients completed the short version of the Disabilities of the Arm, Shoulder, and Hand questionnaire (QuickDASH), the short version of the Patient Health Questionnaire (PHQ-2), the Pain Self-Efficacy Questionnaire (PSEQ), and rated their pain intensity.

Results

The percent of patients that completed the survey was 34 % for mail, 24 % for e-mail, and 80 % for phone. Factors associated with responding to the survey were older age, nonsmoking, and lower pain intensity. Working full-time was associated with not responding.

Conclusions

The response rate to survey by phone is significantly higher than by mail or e-mail. Younger age, smoking, higher pain intensity, and working full-time are associated with not responding.Type of study/level of evidence: Prognostic I  相似文献   
83.
84.
85.
86.
87.
88.
89.
Polymorphisms of three different dopaminergic genes, dopamine D2 receptor (DRD2), dopamine β-hydroxylase (DβH), and dopamine transporter (DAT1), were examined in Tourette syndrome (TS) probands, their relatives, and controls. Each gene individually showed a significant correlation with various behavioral variables in these subjects. The additive and subtractive effects of the three genes were examined by genotyping all three genes in the same set of subjects. For 9 of 20 TS associated comorbid behaviors there was a significant linear association between the degree of loading for markers of three genes and the mean behavior scores. The behavior variables showing the significant associations were, in order, attention deficit hyperactivity disorder (ADHD), stuttering, oppositional defiant, tics, conduct, obsessive-compulsive, mania, alcohol abuse, and general anxiety-behaviors that constitute the most overt clinical aspects of TS. For 16 of the 20 behavior scores there was a linear progressive decrease in the mean score with progressively lesser loading for the three gene markers. These results suggest that TS, ADHD, stuttering, oppositional defiant and conduct disorder, and other behaviors associated with TS, are polygenic, due in part to these three dopaminergic genes, and that the genetics of other polygenic psychiatric disorders may be deciphered using this technique. © 1996 Wiley-Liss, Inc.  相似文献   
90.
A. Wollenberg  S. Barbarot  T. Bieber  S. Christen‐Zaech  M. Deleuran  A. Fink‐Wagner  U. Gieler  G. Girolomoni  S. Lau  A. Muraro  M. Czarnecka‐Operacz  T. Sch?fer  P. Schmid‐Grendelmeier  D. Simon  Z. Szalai  J.C. Szepietowski  A. Ta?eb  A. Torrelo  T. Werfel  J. Ring  the European Dermatology Forum  the European Academy of Dermatology  Venereology  the European Academy of Allergy  Clinical Immunology  the European Task Force on Atopic Dermatitis  European Federation of Allergy  Airways Diseases Patients’ Associations  the European Society for Dermatology  Psychiatry  the European Society of Pediatric Dermatology  Global Allergy  Asthma European Network  the European Union of Medical Specialists 《Journal of the European Academy of Dermatology and Venereology》2018,32(5):657-682
This guideline was developed as a joint interdisciplinary European project, including physicians from all relevant disciplines as well as patients. It is a consensus‐based guideline, taking available evidence from other guidelines, systematic reviews and published studies into account. This first part of the guideline covers methods, patient perspective, general measures and avoidance strategies, basic emollient treatment and bathing, dietary intervention, topical anti‐inflammatory therapy, phototherapy and antipruritic therapy, whereas the second part covers antimicrobial therapy, systemic treatment, allergen‐specific immunotherapy, complementary medicine, psychosomatic counselling and educational interventions. Management of AE must consider the individual clinical variability of the disease; highly standardized treatment rules are not recommended. Basic therapy is focused on treatment of disturbed barrier function by hydrating and lubricating topical treatment, besides further avoidance of specific and unspecific provocation factors. Topical anti‐inflammatory treatment based on glucocorticosteroids and calcineurin inhibitors is used for flare management and for proactive therapy for long‐term control. Topical corticosteroids remain the mainstay of therapy, whereas tacrolimus and pimecrolimus are preferred in sensitive skin areas and for long‐term use. Topical phosphodiesterase inhibitors may be a treatment alternative when available. Adjuvant therapy includes UV irradiation, preferably with UVB 311 nm or UVA1. Pruritus is targeted with the majority of the recommended therapies, but some patients may need additional antipruritic therapy. Antimicrobial therapy, systemic anti‐inflammatory treatment, immunotherapy, complementary medicine and educational intervention will be addressed in part II of the guideline.  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