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   52032篇
  免费   3826篇
  国内免费   171篇
耳鼻咽喉   766篇
儿科学   1223篇
妇产科学   795篇
基础医学   6436篇
口腔科学   846篇
临床医学   5928篇
内科学   10052篇
皮肤病学   633篇
神经病学   4760篇
特种医学   1954篇
外国民族医学   2篇
外科学   8994篇
综合类   795篇
现状与发展   1篇
一般理论   35篇
预防医学   4086篇
眼科学   1168篇
药学   3989篇
  2篇
中国医学   78篇
肿瘤学   3486篇
  2023年   326篇
  2022年   494篇
  2021年   1314篇
  2020年   688篇
  2019年   1275篇
  2018年   1488篇
  2017年   1089篇
  2016年   1100篇
  2015年   1328篇
  2014年   1970篇
  2013年   2518篇
  2012年   3836篇
  2011年   4091篇
  2010年   2227篇
  2009年   1917篇
  2008年   3313篇
  2007年   3621篇
  2006年   3469篇
  2005年   3317篇
  2004年   2887篇
  2003年   2869篇
  2002年   2556篇
  2001年   498篇
  2000年   401篇
  1999年   471篇
  1998年   535篇
  1997年   376篇
  1996年   335篇
  1995年   330篇
  1994年   285篇
  1993年   250篇
  1992年   317篇
  1991年   269篇
  1990年   298篇
  1989年   282篇
  1988年   269篇
  1987年   260篇
  1986年   230篇
  1985年   253篇
  1984年   247篇
  1983年   215篇
  1982年   221篇
  1981年   194篇
  1980年   207篇
  1979年   162篇
  1978年   171篇
  1977年   140篇
  1976年   113篇
  1974年   123篇
  1973年   117篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
1.
2.
3.
PurposeTo examine what proportion of caregivers, if given a choice, would choose medical versus surgical treatment of appendicitis and what factors would be important in their decision.MethodsA survey was devised and given to the caregivers of children presenting to the pediatrician for a routine visit in community and academic pediatric clinics. The survey presented a summary of outcomes after medical (non-operative) and surgical treatment of uncomplicated appendicitis. Participants were then asked to choose medical versus surgical treatment if their child were to develop appendicitis. They were also asked to rate the importance of certain factors in their decision ? 1 being “not important” and 5 being “very important”.ResultsFour hundred surveys were distributed with an 86.2% (345/400) response rate. Six percent (21/342) of respondents reported a history of appendicitis and 49.4% (168/340) reported having known someone who had appendicitis. The majority of respondents, 85.3% (284/333), were mothers. A minority of respondents, 41.7% (95% CI: 36.7, 47.0), chose medical treatment over surgery for appendicitis. There was no statistical difference in the proportion of mothers (41.6%) versus fathers who chose medical treatment (41.3%). Caregivers who chose medical treatment were more likely to rate time in hospital (p = .008) and time out of school (p = 05) as important in decision making when compared with those who chose surgery. Those who chose surgical treatment were more likely to rate risk of recurrent appendicitis (p < .001) as important to decision making. In the multivariate analysis, those who rated time in hospital as very important had more than twice the odds of choosing medical therapy (OR 2.20, p = 0.02) when compared with those who rated it as less important. Not knowing someone who has had appendicitis was significantly associated with choosing medical therapy when compared with those who do know someone who has had appendicitis, OR 2.3, p = .002. Rating pain as very important was also significantly associated with choosing medical therapy, when compared to those rating pain 1–3, OR 3.38, p = .03.ConclusionsIn this survey of caregivers of children presenting for routine care, 41.7% would choose medical, or non-operative, therapy for their children with acute appendicitis. The risk of recurrence, time in hospital, and time out of school, pain, and knowing someone who has had appendicitis were all important factors that families may consider when making a decision. These data may be useful for surgeons counseling patients on which treatment to pursue.  相似文献   
4.
Brian C. Werner 《Arthroscopy》2019,35(4):1072-1073
Achieving tendon-bone healing continues to be challenging after arthroscopic rotator cuff repair, particularly for larger tears, despite significant improvements in repair techniques and implants. Considerable effort has been invested in research to identify methods to improve healing, including patches and injectable biologics. Parathyroid hormone improves tendon-to-bone healing. Teriparatide is osteogenic, stimulating bone growth, and chondrogenic, promoting cartilage formation at the enthesis. However, it could be difficult to justify the expense and potential risk of systemic administration of a recombinant hormone to improve structural healing until improvement in clinical outcomes can be shown.  相似文献   
5.
Brian Barlow 《Arthroscopy》2019,35(5):1441-1444
Arthroscopic iliopsoas fractional lengthening requires careful patient selection, specifically reproducible symptoms, confirmatory physical examination, suggestive imaging findings, and evaluation for microinstability. Resolution of hip snapping is expected in about 80% of cases, but there is a possibility of weakness and pain, presumably from microinstability from the loss of a dynamic anterior hip stabilizer.  相似文献   
6.
The Impella 5.0, a percutaneously inserted left ventricular assist device, has been used to support patients who have severe heart failure or who are undergoing high-risk percutaneous coronary intervention. We report our surgical placement of the Impella 5.0, through a graft sewn to the aorta, to unload the left ventricle of a 59-year-old man who was undergoing venoarterial extracorporeal membrane oxygenation for postcardiotomy shock. The patient underwent successful placement of a long-term left ventricular assist device before his discharge from the hospital. The versatility of the Impella 5.0 is exemplified in this patient who was successfully bridged to long-term support.  相似文献   
7.
8.
9.

Background

Nursing Home Compare (NHC) ratings, created and maintained by Medicare, are used by both hospitals and consumers to aid in the skilled nursing facility (SNF) selection process. To date, no studies have linked NHC ratings to actual episode-based outcomes. The purpose of this study was to evaluate whether NHC ratings are valid predictors of 90-day complications, readmission, and bundle costs for patients discharged to an SNF after primary total joint arthroplasty (TJA).

Methods

All SNF-discharged primary TJA cases in 2017 at a multihospital academic health system were queried. Demographic, psychosocial, and clinical variables were manually extracted from the health record. Medicare NHC ratings were then collected for each SNF. For patients in the Medicare bundle, postacute and total bundle cost was extracted from claims.

Results

Four hundred eighty-eight patients were discharged to a total of 105 unique SNFs. In multivariate analysis, overall NHC rating was not predictive of 90-day readmission/major complications, >75th percentile postacute cost, or 90-day bundle cost exceeding the target price. SNF health inspection and quality measure ratings were also not predictive of 90-day readmission/major complications or bundle performance. A higher SNF staffing rating was independently associated with a decreased odds for >75th percentile 90-day postacute spend (odds ratio, 0.58; P = .01) and a 90-day bundle cost exceeding the target price (odds ratio = 0.69; P = .02) but was similarly not predictive of 90-day readmission/complications.

Conclusion

Results of our study suggest that Medicare's NHC tool is not a useful predictor of 90-day costs, complications, or readmissions for SNFs within our health system.  相似文献   
10.
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