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   15979篇
  免费   858篇
  国内免费   193篇
耳鼻咽喉   285篇
儿科学   311篇
妇产科学   144篇
基础医学   687篇
口腔科学   1143篇
临床医学   2704篇
内科学   566篇
皮肤病学   77篇
神经病学   1654篇
特种医学   1355篇
外国民族医学   1篇
外科学   3249篇
综合类   2090篇
一般理论   1篇
预防医学   786篇
眼科学   780篇
药学   906篇
  34篇
中国医学   175篇
肿瘤学   82篇
  2024年   10篇
  2023年   288篇
  2022年   276篇
  2021年   577篇
  2020年   627篇
  2019年   538篇
  2018年   520篇
  2017年   606篇
  2016年   544篇
  2015年   523篇
  2014年   1014篇
  2013年   1255篇
  2012年   792篇
  2011年   902篇
  2010年   736篇
  2009年   817篇
  2008年   764篇
  2007年   811篇
  2006年   749篇
  2005年   712篇
  2004年   588篇
  2003年   455篇
  2002年   405篇
  2001年   329篇
  2000年   255篇
  1999年   233篇
  1998年   196篇
  1997年   173篇
  1996年   157篇
  1995年   153篇
  1994年   116篇
  1993年   85篇
  1992年   90篇
  1991年   69篇
  1990年   72篇
  1989年   51篇
  1988年   42篇
  1987年   43篇
  1986年   48篇
  1985年   75篇
  1984年   66篇
  1983年   38篇
  1982年   61篇
  1981年   54篇
  1980年   42篇
  1979年   19篇
  1978年   12篇
  1977年   15篇
  1976年   6篇
  1975年   14篇
排序方式: 共有10000条查询结果,搜索用时 46 毫秒
81.
82.
83.
目的探究早期康复护理和功能锻炼应用于骨创伤患者术后效果。方法选取2018年1月—12月本院收治的60例骨创伤手术患者,随机分成观察组与对照组,各组30例。对照组患者接受常规护理,观察组患者实施术后康复护理及功能锻炼。对比两组护理效果。结果观察组的骨折愈合时长与住院时长都短于对照组,差异有统计学意义(P<0.05)。干预6个月后的,观察组的焦虑评分、抑郁评分、疼痛评分以及总分都优于对照组,差异有统计学意义(P<0.05)。结论针对骨创伤手术患者,应用术后康复护理与功能锻炼,可以有效加快患者骨折愈合速度,减轻患者的关节疼痛,促进尽快恢复关节功能,效果突出,推动患者尽早恢复健康。  相似文献   
84.
BackgroundOpen pelvic fractures are rare injuries, associated with high patient morbidity and mortality. Few studies have investigated the impact of patient demographics, comorbidities, and injury related factors on complication and mortality rates. The purpose of this study was to: (1) identify the overall incidence of complications and mortality after open pelvic fractures, (2) compare patient factors between those who did and did not develop complications, (3) identify perioperative independent risk factors for complications and mortality.MethodsA query was performed for patients with open pelvic fractures between 2007 and 2017 using the American College of Surgeons National Trauma Data Bank. Patient and injury specific variables were collected and complications were identified using International Classification of Disease Ninth and Tenth edition Codes. Patient demographic and perioperative data was compared using Fisher’s exact test and chi-square test for categorical variables, and Welch’s t-test for continuous variables. Using pooled data from multiple imputations, logistic regressions were used to calculate odds ratios and confidence intervals of independent risk factors for complications.ResultsA total of 19,834 open pelvic fracture cases were identified, with 9622 patients (48.5%) developing at least one complication. Patients who developed complications were older (35.0 vs 38.1 years), and had higher Injury Severity Scores (17.7 vs 26.5), lower Glasgow Coma Scores (14.2 vs 11.7), and a larger proportion presenting with hypotension (21% vs 6.9%). After pooled regression involving 19 factors, these were the strongest independent predictors of inpatient complication and mortality.ConclusionWe report a mortality rate of 14%, with an inclusive complication rate of 48.5%. Evaluating risk factors for morbidity and mortality for this devastating orthopaedic injury provides knowledge of an inherently sparse population.Level of EvidenceLevel II, Retrospective study.  相似文献   
85.
86.
The purpose of this study was to explore the patterns of head and neck injuries secondary to boxing. We conducted a 20-year retrospective cross-sectional study using the National Electronic Injury Submission System (NEISS). We derived the predictor variables from both patient and injury characteristics. The principal outcome variable was the probability of hospital admission from the ED. We used bivariate analysis to determine if an association existed between two variables of interest. We created a multiple logistic regression model to model the probability of admission using all significant univariate predictors. The final sample consisted of 1,919 patients. Children were most likely to injure their heads (p < 0.01). Young adults were also most likely to injure their heads (p < 0.05). Adults were most likely to injure their faces (p < 0.01). Children were most likely to incur facial contusions (p < 0.01) and internal organ injuries (p < 0.01). Young adults were most likely to suffer concussions (p < 0.01). Adults were most likely to suffer lacerations (p < 0.01). Certain age groups were more/less likely to injure a particular anatomical site and more/less likely to incur a particular type of injury. Relative to young adults, seniors had an increased odd of admission. Head injuries had an increased odds of admission relative to mouth injuries. Fractures and internal organ injuries proved to be the most dangerous injuries.  相似文献   
87.
88.
Reconstruction of the orbital floor is common in cases of trauma and a variety of alloplastic materials, including titanium, can be used. However, we know of no reports about what happens to these materials if there is a second injury to the surgical site. This pilot study on six human cadavers (12 orbits) was therefore designed to investigate the possible outcomes should this occur. A “blowout fracture” was created in each orbit, which was then repaired using a preformed titanium implant. In two orbits, two implants were placed without fixation. The remaining implants were secured to the anterior orbital floor with a single screw, which was placed laterally or medially. A second impact sufficient to fracture the zygomaticomaxillary complex was then applied and its effect on the implants noted.  相似文献   
89.
90.
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