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   6194篇
  免费   398篇
  国内免费   16篇
耳鼻咽喉   175篇
儿科学   374篇
妇产科学   66篇
基础医学   657篇
口腔科学   81篇
临床医学   489篇
内科学   1408篇
皮肤病学   139篇
神经病学   478篇
特种医学   184篇
外科学   1072篇
综合类   58篇
一般理论   2篇
预防医学   468篇
眼科学   102篇
药学   381篇
中国医学   5篇
肿瘤学   469篇
  2023年   32篇
  2022年   58篇
  2021年   203篇
  2020年   119篇
  2019年   171篇
  2018年   229篇
  2017年   173篇
  2016年   178篇
  2015年   207篇
  2014年   302篇
  2013年   342篇
  2012年   482篇
  2011年   490篇
  2010年   251篇
  2009年   217篇
  2008年   391篇
  2007年   379篇
  2006年   340篇
  2005年   288篇
  2004年   274篇
  2003年   277篇
  2002年   212篇
  2001年   76篇
  2000年   69篇
  1999年   70篇
  1998年   49篇
  1997年   47篇
  1996年   49篇
  1995年   34篇
  1994年   26篇
  1993年   23篇
  1992年   35篇
  1991年   31篇
  1990年   33篇
  1989年   28篇
  1988年   38篇
  1987年   27篇
  1986年   32篇
  1985年   31篇
  1984年   19篇
  1983年   25篇
  1982年   24篇
  1981年   23篇
  1980年   16篇
  1979年   18篇
  1978年   14篇
  1977年   18篇
  1976年   14篇
  1973年   16篇
  1972年   18篇
排序方式: 共有6608条查询结果,搜索用时 781 毫秒
81.
82.
83.
84.
85.
Microorganisms can affect the entire neuraxis, producing a variety of neurologic complications that frequently entail prolonged hospitalizations and complicated treatment regimens. The spread of pathogens to new regions and the reemergence of opportunistic organisms in immunocompromised patients pose increasing challenges to health care professionals. Because rapid diagnosis and treatment may prevent long-term neurologic sequelae, providers should approach these diseases with a structured, neuroanatomic framework, incorporating a thorough history, examination, laboratory analysis, and neuroimaging in their clinical reasoning and decision-making.  相似文献   
86.
87.
88.
Forty-four-year-old male with ulcerative colitis (UC) for 11 years reported frequent relapse despite daily sulfasalazine 4 g, azathioprine 125 mg, and rectal 5-aminosalicylic acid. Repeated use of corticosteroids led to cataract. At enrollment, he was passing eight stools a day with blood with a Mayo score of 9 (3+1+3+2). Stool was negative for ova/cysts/acid fast bacilli and Clostridium difficile toxin assay. Rectal biopsy showed cryptitis, crypt abscess, and crypt distortion with no inclusion bodies, and cytomegalovirus DNA was negative. Following informed consent and approval from IEC, three sessions of fecal microbiota transplant (FMT) were performed at intervals of 2 weeks. The donor was a 34-year-old relative with no history of gastrointestinal illness, no use of antibiotics over 3 months, and free from transmissible disease as per standard protocol. At colonoscopy, 350 mL of blended and filtered donor stool, drawn into seven syringes of 50 cm3, was instilled from terminal ileum to sigmoid. Follow up sigmoidoscopy and rectal biopsy were done monthly for 6 months. There was symptomatic, colonoscopic, and histopathological improvement with the Mayo scores of 4.1 and 0 at 4.8 and 12 weeks post FMT. Azathioprine and sulfasalazine were tapered sequentially between months 4 and 6 of FMT. He remains in clinical and endoscopic remission 8 months after FMT and 2 months after withdrawal of all medication. Colonoscopic FMT may be effective in inducing drug-free remission in patients with active UC.  相似文献   
89.
90.
Background: South Africa has one of the highest rates of fetal alcohol spectrum disorder (FASD) in the world. However, little is known about what men and women who attend alcohol serving establishments believe about alcohol use during pregnancy and how these beliefs may be related to alcohol use. Objectives: To understand FASD beliefs and related behaviors among men and women attending alcohol-serving establishments. Methods: We surveyed 1047 men (n?=?565) and women (n?=?482) -including pregnant women and men with pregnant partners- attending alcohol serving establishments in a township located in Cape Town, South Africa. Results: Among both pregnant (n?=?53) and non-pregnant (n?=?429) women, 54% reported drinking alcohol at least 2–4 times per month, and 57% reported having at least 3–4 alcohol drinks during a typical drinking session. Pregnant women were less likely to believe that they should not drink alcohol and that alcohol can harm a fetus when compared to non-pregnant women. Similar findings were observed between men with pregnant partners compared to men without pregnant partners. Among women, beliefs about how much alcohol pregnant women can safely drink were associated with self-reported alcohol use. Conclusions: Efforts to address FASD need to focus on understanding how men and women perceive alcohol use during pregnancy and situational factors that contribute to alcohol consumption among pregnant women attending alcohol serving establishments. Structural and individual-level interventions targeting women at alcohol serving establishments should be prioritized to mitigate alcohol use during pregnancy.  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