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   1340080篇
  免费   101793篇
  国内免费   2233篇
耳鼻咽喉   19363篇
儿科学   46146篇
妇产科学   36213篇
基础医学   189007篇
口腔科学   34867篇
临床医学   117252篇
内科学   270970篇
皮肤病学   29018篇
神经病学   106314篇
特种医学   53290篇
外国民族医学   665篇
外科学   206987篇
综合类   27777篇
现状与发展   1篇
一般理论   466篇
预防医学   101003篇
眼科学   29166篇
药学   98631篇
  2篇
中国医学   2521篇
肿瘤学   74447篇
  2019年   10416篇
  2018年   14707篇
  2017年   11086篇
  2016年   12041篇
  2015年   13631篇
  2014年   19130篇
  2013年   29007篇
  2012年   40159篇
  2011年   42402篇
  2010年   25231篇
  2009年   23967篇
  2008年   40464篇
  2007年   43285篇
  2006年   43409篇
  2005年   42329篇
  2004年   41317篇
  2003年   39850篇
  2002年   38957篇
  2001年   64460篇
  2000年   66887篇
  1999年   56921篇
  1998年   15762篇
  1997年   14335篇
  1996年   14692篇
  1995年   13908篇
  1994年   13192篇
  1993年   12168篇
  1992年   44871篇
  1991年   43781篇
  1990年   42469篇
  1989年   40343篇
  1988年   37134篇
  1987年   36453篇
  1986年   33848篇
  1985年   32582篇
  1984年   24518篇
  1983年   20588篇
  1982年   12196篇
  1981年   11124篇
  1979年   21520篇
  1978年   15065篇
  1977年   12758篇
  1976年   11879篇
  1975年   12816篇
  1974年   14813篇
  1973年   14279篇
  1972年   13067篇
  1971年   11836篇
  1970年   11129篇
  1969年   10099篇
排序方式: 共有10000条查询结果,搜索用时 13 毫秒
61.
Atherosclerotic renal artery stenosis (ARAS) may cause hypertension, progressive renal failure, and recurrent pulmonary edema. It typically occurs in high risk patients with coexistent vascular disease elsewhere. Most patients with ARAS are likely to die from coronary heart disease or stroke before end-stage renal failure occurs. Recent controlled trials have shown that most patients undergoing angioplasty to treat renovascular hypertension still need antihypertensive agents 6 or 12 months after the procedure. Nevertheless, the number of antihypertensive agents required to control blood pressure adequately is lower following angioplasty than for medication alone. Trials assessing the value of revascularization for preserving renal function or preventing clinical events are only in the early recruitment phase. Revascularization should be undertaken in patients with ARAS and resistant hypertension or heart failure, and probably in those with rapidly deteriorating renal function or with an increase in plasma creatinine levels during angiotensin-converting enzyme inhibition. With or without revascularization, medical therapy using antihypertensive, hypolipidemic and antiplatelet agents is necessary in almost all cases.  相似文献   
62.
We report the case of a patient with a 13-year history of pemphigus vulgaris (PV) treated with immunosuppressive agents, prednisone and mycophenolate mofetil who had developed lesions of Kaposi's sarcoma (KS) on a sole plaque of PV that had been previously treated with intralesional injections of steroids. The lesions were surgically removed and polymerase chain reaction (PCR) demonstrated human herpesvirus-8 (HHV-8) DNA. There were neither recurrences nor later dissemination of KS following gradual decrease of the immunosuppressive therapy. We suggest that the treatment with intralesional steroids may have influenced the local reactivation of a latent infection of the virus, determining the appearance of this localized KS.  相似文献   
63.
OBJECTIVES: To identify and describe current women's thoughts about the menopause, hormone treatment (HT) and perceptions about breast cancer. METHODS: Between December 2004 and January 2005, 4201 postmenopausal women in seven European countries were interviewed via a standardized computer-aided telephone interview protocol. RESULTS: Almost all women reported to have experienced climacteric symptoms, and 63% of the women rated them as being severe. Only 52% of women were aware of the benefits of HT for relief of climacteric symptoms. Although 84% felt that severe symptoms should be treated, only 40% had used HT at some point in time. Thirty-four percent of the women preferring treatment with natural products did so because of the risk of breast cancer associated with HT. HT was recognized by 59% of the women as one of the most important contributors to an increased breast cancer risk. Most women received their information about HT and breast cancer risk from the media. CONCLUSIONS: This European survey reveals that the majority of women experience climacteric symptoms but that their decision whether or not to use HT is highly dependent on their concern about breast cancer risk. An increase in knowledge of the benefits and risks of HT is required for women to make appropriate decisions about hormone use.  相似文献   
64.
65.
Conclusions Limitation of this analysis is participation of limited centers. Though all the regions of the country are represented total number of procedures reported are less. Isolated CABG is commonest procedure performed in 2004. Congenital surgical procedures are more than the valvular heart disease procedure. For appropriate categorization we need standard nomenclature for various congenital surgical procedures.  相似文献   
66.
67.
68.
We report our experience of eight cases of isolated full thickness burns of the penis. Early excision of burns of the penile shaft and repair with a preputial flap or mesh split skin graft produces excellent results, with a reduction in complications and an early re-establishment of sexual function. Conservative treatment of burns of the glans, on the other hand, is appropriate and results in minimal scarring.  相似文献   
69.
The use of additional epidural sympathetic block during and after microvascular surgery in the lower extremities to prevent vasospasm is generally agreed on. However, a significant fall in the perfusion rate of the transplants was seen after application of bupivacaine (Marcain) via the epidural catheter. This effect has, to our knowledge, not been described before and is probably caused by the sympathectomy effect of this type of analgesia.  相似文献   
70.
The present study demonstrates that alcohol-induced memory impairment can be attenuated by pretreatment with an oral tryptophan supplementation. These results provide support for the role of a brain serotonin deficit in this impairment and highlight the impact a dietary manipulation can have on a complex behavioral process.  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