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   589篇
  免费   32篇
  国内免费   1篇
耳鼻咽喉   42篇
儿科学   8篇
妇产科学   17篇
基础医学   77篇
口腔科学   5篇
临床医学   70篇
内科学   84篇
皮肤病学   13篇
神经病学   87篇
特种医学   18篇
外科学   64篇
综合类   5篇
预防医学   61篇
药学   46篇
肿瘤学   25篇
  2019年   5篇
  2018年   9篇
  2015年   3篇
  2014年   13篇
  2013年   21篇
  2012年   14篇
  2011年   9篇
  2010年   4篇
  2009年   11篇
  2008年   21篇
  2007年   32篇
  2006年   22篇
  2005年   37篇
  2004年   29篇
  2003年   19篇
  2002年   39篇
  2001年   14篇
  2000年   27篇
  1999年   30篇
  1998年   6篇
  1997年   5篇
  1996年   12篇
  1995年   2篇
  1993年   7篇
  1992年   11篇
  1991年   21篇
  1990年   22篇
  1989年   22篇
  1988年   13篇
  1987年   21篇
  1986年   17篇
  1985年   17篇
  1984年   7篇
  1983年   3篇
  1982年   9篇
  1981年   5篇
  1980年   3篇
  1979年   7篇
  1978年   3篇
  1977年   5篇
  1976年   7篇
  1975年   2篇
  1974年   3篇
  1973年   2篇
  1972年   7篇
  1971年   7篇
  1969年   2篇
  1968年   2篇
  1967年   2篇
  1966年   4篇
排序方式: 共有622条查询结果,搜索用时 15 毫秒
21.
22.
BACKGROUND: Clinical factors related to suicide and suicide attempts have been studied much more extensively in unipolar depression compared with bipolar disorder. We investigated demographic and course-of-illness variables to better understand the incidence and potential clinical correlates of serious suicide attempts in 648 outpatients with bipolar disorder. METHOD: Patients with bipolar I or II disorder (DSM-IV criteria) diagnosed with structured interviews were evaluated using self-rated and clinician-rated questionnaires to assess incidence and correlates of serious suicide attempts prior to study entry. Clinician prospective ratings of illness severity were compared for patients with and without a history of suicide attempt. RESULTS: The 34% of patients with a history of suicide attempts, compared with those without such a history, had a greater positive family history of drug abuse and suicide (or attempts); a greater personal history of early traumatic stressors and more stressors both at illness onset and for the most recent episode; more hospitalizations for depression; a course of increasing severity of mania; more Axis I, II, and III comorbidities; and more time ill on prospective follow-up. In a hierarchical logistic regression, a history of sexual abuse, lack of confidant prior to illness onset, more prior hospitalizations for depression, suicidal thoughts when depressed, and cluster B personality disorder remained significantly associated with a serious suicide attempt. CONCLUSION: Our retrospective findings, supplemented by prospective follow-up, indicate that a history of suicide attempts is associated with a more difficult course of bipolar disorder and the occurrence of more psychosocial stressors at many different time domains. Greater attention to recognizing those at highest risk for suicide attempts and therapeutic efforts aimed at some of the correlates identified here could have an impact on bipolar illness-related morbidity and mortality.  相似文献   
23.
Rationale and Objectives:  Carbamazepine has shown reasonable antimanic properties, but its use has been limited because of enzyme-inducing effects. The keto-derivative oxcarbazepine (OXC) is very similar to carbamazepine, however, the metabolic pathway is different. OXC is not metabolized to the 10, 11–epoxide, which seems to be responsible for several undesirable side-effects of carbamazepine and furthermore OXC has less enzyme-inducing properties.
Methods:  In this non-random open label study, patients were treated with OXC for 14 days, crossed over to no OXC for 7 days, and then crossed back over to OXC for the remaining 14 days. OXC was titrated to a final dose in a range of 900–2100 mg due to individual response. Treatment success was defined as a reduction of the original Young Mania Rating Scale (YMRS) score of more than 50% at the end of study period.
Results:  Four of the 12 included patients (33%) met defined response criteria at the end of study period. Fifty percentage of the patients had to be prematurely excluded from the trial. The mean YMRS scores of the on-periods were obviously different from the off-period. Forty-two percentage of the patients experienced side-effects leading to premature discontinuation in two of 12 patients.
Conclusion:  Antimanic activity of OXC was demonstrated in this pilot study only for patients with mild or moderate manic symptoms. Further studies are encouraged to clarify OXC's role as mood-stabilizer and assess whether it has a profile similar to that of carbamazepine.  相似文献   
24.
25.
Problem-based learning has been used by individuals from various professions and in a wide array of academic and clinical settings. The primary benefits of PBL are that it allows learners to be actively engaged in the learning process and that it can help to strengthen problem-solving skills for learners on any level. PBL can be used effectively in the NICU for both novice and advanced practice nurses.  相似文献   
26.
Primary mediastinal trophoblastic teratomas.   总被引:1,自引:1,他引:0       下载免费PDF全文
P A Walden  R L Woods  B Fox    K D Bagshawe 《Thorax》1977,32(6):752-758
Three cases of primary mediastinal trophoblastic teratoma are described. One patient died from respiratory failure during the initial chemotherapy, Another patient with advanced disease is now apparently free from disease after multiple-drug chemotherapy. The third patient is alive and well four years after a combination of surgery, radiotherapy, and multiple-drug chemotherapy. In the diagnosis and assessment of response to treatment in these tumours emphasis is placed on the measurement of the tumour cell markers, chorionic gonadotrophin and alpha-fetoprotein, by radioimmunoassay. The efficacy of multiple-drug regimens is discussed together with a review of the literature.  相似文献   
27.
Leptin deficiency has been associated with extreme obesity and hyperphagia in rodents and humans. A rare genetic disorder in humans yields the absence of the hormone leptin, extreme obesity, and a ravenous appetite. Reports on these rare cases have indicated that therapy using leptin injections can yield significant weight loss and changes in appetite. The aim of this report on acute leptin therapy in three leptin deficient adults was to provide a microanalysis of changes in eating behavior and ratings of hunger and satiety. In addition to substantial weight loss, 15 weeks of leptin therapy was associated with approximately 50% reduction in food intake and substantial changes in ratings of hunger and satiety before most meals. After short-term leptin therapy, the three participants ate until ratings indicated they were satiated, which was comparable to the ratings before leptin therapy. These findings suggest that one of the primary effects of acute leptin therapy may be to reduce the ravenous hunger associated with leptin deficiency, resulting in reduced food intake and significant weight loss. These results are discussed in the context of the scientific literature pertaining to leptin and its effects on appetite and obesity.  相似文献   
28.
29.
30.
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