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   177166篇
  免费   1166篇
  国内免费   9篇
耳鼻咽喉   1140篇
儿科学   6699篇
妇产科学   3063篇
基础医学   16842篇
口腔科学   1605篇
临床医学   12574篇
内科学   31105篇
皮肤病学   678篇
神经病学   16616篇
特种医学   8930篇
外科学   28883篇
综合类   2322篇
一般理论   1篇
预防医学   18327篇
眼科学   2794篇
药学   9639篇
中国医学   627篇
肿瘤学   16496篇
  2023年   32篇
  2022年   68篇
  2021年   135篇
  2020年   69篇
  2019年   110篇
  2018年   22002篇
  2017年   17422篇
  2016年   19567篇
  2015年   961篇
  2014年   867篇
  2013年   861篇
  2012年   7078篇
  2011年   21107篇
  2010年   18855篇
  2009年   11549篇
  2008年   19559篇
  2007年   21783篇
  2006年   611篇
  2005年   2231篇
  2004年   3423篇
  2003年   4383篇
  2002年   2540篇
  2001年   300篇
  2000年   419篇
  1999年   196篇
  1998年   217篇
  1997年   224篇
  1996年   103篇
  1995年   116篇
  1994年   113篇
  1993年   70篇
  1992年   59篇
  1991年   104篇
  1990年   145篇
  1989年   98篇
  1988年   71篇
  1987年   54篇
  1986年   44篇
  1985年   44篇
  1984年   32篇
  1983年   29篇
  1982年   49篇
  1980年   47篇
  1974年   32篇
  1968年   25篇
  1938年   60篇
  1937年   25篇
  1934年   30篇
  1932年   56篇
  1930年   46篇
排序方式: 共有10000条查询结果,搜索用时 78 毫秒
981.
The role for lifestyle modifications to correct dyslipidemia(s) is reviewed. Dietary composition is crucial. Replacing saturated fat with MUFA or n-6 PUFA lowers plasma low-density lipoproteins (LDL) cholesterol and ameliorates the LDL/HDL ratio. Replacing saturated fat with carbohydrates has diverging effects due to the heterogeneity of carbohydrate foods. Diets rich in refined carbohydrates increase fasting and postprandial triglycerides, whereas the consumption of fiber-rich, low GI foods lowers LDL cholesterol with no detrimental effects on triglycerides. The role of polyphenols is debated: available evidence suggests a lowering effect of polyphenol-rich foods on postprandial triglycerides. As for functional foods, health claims on a cholesterol lowering effect of psyllium, beta-glucans and phytosterols are accepted by regulatory agencies. The importance of alcohol intake, weight reduction, and physical activity is discussed. In conclusion, there is evidence that lifestyle affects plasma lipid. A multifactorial approach including multiple changes with additive effects is the best option. This may also ensure feasibility and durability. The traditional Mediterranean way of life can represent a useful model.  相似文献   
982.
983.
Over the last several decades, significant advances and improvements in care of transplant patients have resulted in markedly improved outcomes. A number of options are available for patients with advanced cardiopulmonary dysfunction requiring transplantation. There is a debate about when isolated heart or isolated lung transplantation is no longer possible or advisable and combined heart-lung transplantation is justified. Organ availability and allocation severely limit the latter option to very few well-selected patients. We review practice patterns, trends, and outcomes after triple-organ heart-lung transplant (HLTx) worldwide, as well as our own experience with heart-lung transplant in the modern era.  相似文献   
984.
985.
Four years after the latest edition, the 2015 non-ST-segment elevation acute coronary syndromes guidelines of the European Society of Cardiology have been published. Novel aspects include a new diagnostic algorithm for non-ST-segment elevation myocardial infarction using high-sensitivity cardiac troponins as well as guidance on cardiac rhythm monitoring duration. A large section is dedicated to antiplatelet therapy including initiation and duration of dual-antiplatelet therapy as well as the management of patients requiring, at the same time, long-term oral anticoagulation. New sections include the management of antiplatelet agent in patients requiring coronary artery bypass surgery and of acute bleeding events related to antiplatelet agents, vitamin K antagonist (VKA), and non-VKA oral anticoagulant drugs. Current evidence supports the radial access over the femoral one for coronary angiography and percutaneous revascularization.  相似文献   
986.
Breast-conserving therapy, which includes wide local excision of the tumor followed by irradiation, has become a standard treatment option for women with early-stage invasive breast cancer. The potential advantages of conservative breast surgery include the minor outpatient nature of the procedures, lower incidence of post-operative pain and complications, preservation of the breast and nipple areolar complex, and shorter delay to adjuvant therapy. However, not all patients are optimal candidates for breast-conserving procedures. Oncoplastic techniques combine the removal of breast cancer tumors in combination with either local volume replacement techniques to correct small defects, or by immediate reconstruction of larger defects using techniques of plastic surgery with or without contralateral breast procedures for symmetry. Therefore, oncoplastic techniques offer the potential to perform a wider excision of the tumor with an improved cosmetic result, thus potentially increasing the eligible pool for breast conservation.  相似文献   
987.
988.
989.
990.
Abdominal pain is one of the common symptoms reported by children in urgent care clinics. While most children tend to have self-limiting conditions, the treating pediatrician should watch out for underlying serious causes like intestinal obstruction and perforation peritonitis, which require immediate referral to an emergency department (ED). Abdominal pain may be secondary to surgical or non-surgical causes, and will differ as per the age of the child. The common etiologies for abdominal pain presenting to an urgent care clinic are acute gastro-enteritis, constipation and functional abdominal pain; however, a variety of extra-abdominal conditions may also present as abdominal pain. Meticulous history taking and physical examination are the best tools for diagnosis, while investigations have a limited role in treating benign etiologies.  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