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   2048311篇
  免费   149806篇
  国内免费   3140篇
耳鼻咽喉   29570篇
儿科学   64105篇
妇产科学   54316篇
基础医学   290223篇
口腔科学   58037篇
临床医学   178252篇
内科学   405990篇
皮肤病学   43846篇
神经病学   159770篇
特种医学   81279篇
外国民族医学   725篇
外科学   322966篇
综合类   42097篇
现状与发展   2篇
一般理论   579篇
预防医学   147119篇
眼科学   46063篇
药学   155182篇
  5篇
中国医学   4208篇
肿瘤学   116923篇
  2018年   20175篇
  2017年   15480篇
  2016年   17107篇
  2015年   19342篇
  2014年   26771篇
  2013年   40300篇
  2012年   55164篇
  2011年   58131篇
  2010年   34735篇
  2009年   33225篇
  2008年   56272篇
  2007年   59908篇
  2006年   60742篇
  2005年   58854篇
  2004年   57385篇
  2003年   55481篇
  2002年   54490篇
  2001年   107562篇
  2000年   111632篇
  1999年   94252篇
  1998年   23906篇
  1997年   21360篇
  1996年   21804篇
  1995年   20515篇
  1994年   19237篇
  1993年   17773篇
  1992年   73357篇
  1991年   71181篇
  1990年   69087篇
  1989年   66564篇
  1988年   61043篇
  1987年   59797篇
  1986年   55759篇
  1985年   53512篇
  1984年   39195篇
  1983年   33061篇
  1982年   18277篇
  1981年   16335篇
  1979年   34927篇
  1978年   23851篇
  1977年   20422篇
  1976年   18415篇
  1975年   20116篇
  1974年   23823篇
  1973年   22736篇
  1972年   21215篇
  1971年   19684篇
  1970年   18650篇
  1969年   17170篇
  1968年   15570篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
91.
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   
92.
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   
93.
94.
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   
95.
96.
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   
97.
98.
99.
100.
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   
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