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   7010篇
  免费   1330篇
  国内免费   19篇
耳鼻咽喉   159篇
儿科学   39篇
妇产科学   12篇
基础医学   103篇
口腔科学   6570篇
临床医学   153篇
内科学   241篇
皮肤病学   69篇
神经病学   103篇
特种医学   76篇
外科学   554篇
预防医学   109篇
眼科学   5篇
药学   34篇
中国医学   2篇
肿瘤学   130篇
  2024年   26篇
  2023年   344篇
  2022年   14篇
  2021年   34篇
  2020年   108篇
  2019年   23篇
  2018年   229篇
  2017年   328篇
  2016年   365篇
  2015年   440篇
  2014年   461篇
  2013年   458篇
  2012年   244篇
  2011年   253篇
  2010年   361篇
  2009年   551篇
  2008年   242篇
  2007年   201篇
  2006年   195篇
  2005年   159篇
  2004年   150篇
  2003年   202篇
  2002年   159篇
  2001年   193篇
  2000年   172篇
  1999年   184篇
  1998年   248篇
  1997年   224篇
  1996年   207篇
  1995年   185篇
  1994年   181篇
  1993年   130篇
  1992年   146篇
  1991年   98篇
  1990年   101篇
  1989年   72篇
  1988年   95篇
  1987年   89篇
  1986年   44篇
  1985年   76篇
  1984年   65篇
  1983年   63篇
  1982年   54篇
  1981年   36篇
  1978年   14篇
  1977年   13篇
  1976年   16篇
  1975年   23篇
  1974年   15篇
  1972年   15篇
排序方式: 共有8359条查询结果,搜索用时 0 毫秒
991.
992.

Background/purpose

The indications for hepatic resection for hepatocellular carcinoma (HCC) patients with total bilirubin (T-Bil) equal to or higher than 1.2 mg/dl remain controversial. The aim of this study was to investigate the safety of hepatic resection for HCC patients who showed high T-Bil (≥1.2 mg/dl) with low direct bilirubin (D-Bil ≤ 0.5 mg/dl).

Methods

Thirty-four HCC patients showing high T-Bil with low D-Bil were treated with mono- to tri-segmentectomy between January 2000 and December 2010. The perioperative clinical parameters and prognosis of the high T-Bil/low D-Bil patients were compared with those of 253 HCC patients showing normal T-Bil. In addition, complication rates of the patients with high T-Bil/high D-Bil (n = 4) were analyzed.

Results

The prothrombin time activity, indocyanine green clearance test, asialo-scintigraphy, and platelet count were similar in the two groups. The mean serum albumin in high T-Bil/low D-Bil patients was significantly higher than that of normal T-Bil patients (4.2 ± 0.5 vs. 4.0 ± 0.4 g/dl, P = 0.004). There were no significant differences in operation time, intraoperative bleeding, red cell concentrate transfusion rate, postoperative complication rate, and disease-free and overall survivals between the two groups. Postoperative hyperbilirubinemia (T-Bil >5 mg/dl) with ascites was observed in one of four high T-Bil/high D-Bil patients (25 %).

Conclusions

Mono- to tri-segmentectomy can be performed in patients with low D-Bil (≤0.5 mg/dl) similarly to patients with low T-Bil (<1.2 mg/dl), even in HCC patients showing high T-Bil (≥1.2 mg/dl).  相似文献   
993.
994.
995.
996.
997.
PURPOSE: Data are used to examine current and future conditions important to the private practice of prosthodontics. A concern is raised as to whether the future supply of prosthodontists is in sync with the dynamics of the US population and patient population. MATERIALS AND METHODS: Four trends are examined using data from various sources. The trends include: (1) growth in the number of private practicing prosthodontists, (2) projections of the future number of private practicing prosthodontists, (3) first year enrollment in dental schools, and (4) enrollments and graduates in residency programs. RESULTS: The number of private practicing prosthodontists has increased modestly over the past 21 years, growing 1.33% per year. The number of private practitioners is projected to reach 4,125 in 2025. A key variable in this projection is the growing number of elderly adults. While dental school enrollments have been increasing, concern is raised about the amount of exposure by students to an undergraduate curriculum in prosthodontics. There has been a general decline in enrollment in the nation's prosthodontics residency programs at the rate of -2.9% per year. An average of 181 program graduates are needed to achieve the 4125 projected number of private practitioners. CONCLUSION: Increasing demand for services from prosthodontists is supported by an increasing US population size and a growing population of elderly. Efforts to grow the number of private practicing prosthodontists will have to consider several concerns including residency program enrollments, undergraduate exposure to prosthodontics, and the overall economic returns expected from engaging in the private practice of prosthodontics. Choosing a career as a private practicing prosthodontist is a timely consideration and complimented by expected increases in demand for care and favorable financial returns to practice.  相似文献   
998.
999.
1000.
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