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   492篇
  免费   27篇
  国内免费   4篇
耳鼻咽喉   6篇
儿科学   11篇
妇产科学   40篇
基础医学   46篇
口腔科学   18篇
临床医学   35篇
内科学   132篇
皮肤病学   7篇
神经病学   14篇
特种医学   15篇
外国民族医学   1篇
外科学   54篇
综合类   11篇
预防医学   32篇
眼科学   21篇
药学   44篇
肿瘤学   36篇
  2023年   7篇
  2022年   18篇
  2021年   17篇
  2020年   10篇
  2019年   11篇
  2018年   13篇
  2017年   14篇
  2016年   10篇
  2015年   8篇
  2014年   21篇
  2013年   21篇
  2012年   29篇
  2011年   40篇
  2010年   25篇
  2009年   23篇
  2008年   34篇
  2007年   32篇
  2006年   35篇
  2005年   23篇
  2004年   33篇
  2003年   15篇
  2002年   22篇
  2001年   6篇
  2000年   13篇
  1999年   3篇
  1998年   3篇
  1997年   2篇
  1995年   1篇
  1994年   1篇
  1993年   1篇
  1992年   3篇
  1991年   2篇
  1990年   2篇
  1989年   1篇
  1988年   1篇
  1987年   1篇
  1986年   1篇
  1985年   2篇
  1984年   5篇
  1983年   2篇
  1979年   1篇
  1977年   2篇
  1974年   3篇
  1971年   1篇
  1969年   2篇
  1967年   1篇
  1966年   1篇
  1962年   1篇
排序方式: 共有523条查询结果,搜索用时 0 毫秒
91.

Purpose

Serum anti-Mullerian hormone (AMH) levels estimate ovarian reserve. The purpose of this study was to identify a minimum serum AMH level that correlates with acceptable clinical pregnancy rate (CPR) in women with severe diminished ovarian reserve (DOR) undergoing in vitro fertilization (IVF).

Methods(s)

A historical cohort of severe DOR participants (age ≥35) with day 3 FSH of >10 ng/mL were included (n?=?120). Participants were categorized into 3 groups: AMH <0.2 (Group 1, n?=?38), AMH?=?0.2-0.79 (Group 2, n?=?57) and AMH?≥?0.8 (Group 3, n?=?25) ng/mL. The main outcome was CPR. The number of retrieved and mature oocytes, transferred embryos, spontaneous abortion (SAB) and live birth (LB) rates were also evaluated.

Result(s)

Among the three groups, there was no difference in day 3 FSH and estradiol, total gonadotropins dose used per cycle, or LB. Participants in Group 1 were two years older than those in Group 2 and had significantly higher BMI than those in Groups 2 and 3. The three groups significantly differed in AFC (Group 1< Group 2< Group 3; p?=?0.001) and cycle cancellation rate (Group 1> Group 2> Group 3; p?=?0.006), and had a trend toward significance in SAB rate (Group 1> Group 2> Group 3; p?=?0.06). Group 3 had significantly more retrieved and mature oocytes than Groups 1 or 2. Group 2 and 3 had significantly higher CPR per cycle start compared to Group 1. Although Group 2 had significantly fewer oocytes retrieved and mature oocytes than Group 3, CPR per cycle start for both groups was not different. ROC curve indicated that the point of maximal inflection between lower and higher CPR represents an AMH value of 0.2 ng/mL.

Conclusion(s)

AMH of 0.2 ng/mL appears to be a meaningful threshold for predicting CPR in women with severe DOR at our practice. This information can be crucial during the pre-cycle counseling of these women.  相似文献   
92.
Until recently, various therapies for localized scleroderma have been used with limited success. Recently, phototherapy, with or without psoralen, was proposed as a successful treatment modality. The aim of this study was to evaluate the effect of broad-band low-dose ultraviolet A (UVA) phototherapy in patients with localized scleroderma, using a new method for evaluation. Twelve patients complaining of morphea were exposed to UVA irradiation at a dose of 20 J/cm2 3 times per week for 20 sessions. Selected covered plaques served as internal controls. The efficacy of therapy was judged clinically by sequential inspection and palpation. In biopsy specimens from exposed and covered plaques stained with hematoxylin and eosin (H & E) and Masson trichrome stains, the concentration of collagen per dermal surface area was measured with the use of a computerized image analyzer. All patients reported remarkable softening of skin lesions, confirmed by sequential palpatory assessment. A significant reduction in the mean concentration of collagen per surface area was detected in the plaques exposed to UVA (the P value being 0.007, P<0.01), whereas in the covered plaques the difference was not statistically significant (the P value being 0.10, P>0.05). The conclusion is that low-dose broad-band UVA phototherapy is a very effective and safe treatment modality for localized scleroderma.  相似文献   
93.
94.
95.

Purpose  

To report three cases of migrated levonorgestrel intrauterine device (LNG-IUS) into the pelvic/abdominal cavity removed laparoscopically with the aid of preoperative computed tomography (CT) scan imaging.  相似文献   
96.
97.
BACKGROUND: Asparaginase is an essential component of the chemotherapy regimens during the induction and intensification phases for acute lymphoblastic leukemia and lymphoblastic lymphoma. The administration of asparaginase can cause elevation of the triglyceride levels. CASE REPORT: This study reports the case of an adult patient presenting with acute pancreatitis secondary to severe hypertriglyceridemia after asparaginase treatment during the consolidation phase of lymphoblastic lymphoma. This condition was successfully treated with plasmapheresis. CONCLUSIONS: Our case demonstrates that plasmapheresis in severe cases of hypertriglyceridemia offers a safe and efficient treatment option for symptomatic patients.  相似文献   
98.
BackgroundBreast cancer affects women''s lives worldwide, yet early detection is an effective strategy for reducing mortality. The participation of women in mammography screening is linked to their knowledge, attitudes and perceived barriers.ObjectivesOur study aims to assess mammography screening uptake and barriers among women attending primary healthcare centres (PHCs) in northern Palestine.MethodsUsing an interviewer administered questionnaire, we used a cross-sectional study design to determine mammography screening uptake, knowledge and barriers among 357 women attending PHCs in Northern Palestine between December 2018 and March 2019.ResultsThe mean age was 50 years. The majority (69.2%) were considered to have adequate knowledge about breast cancer and mammography screening. Mammography screening uptake among the participants was 37%. Almost 85% of the women had a positive attitude towards breastfeeding as a prophylaxis factor against breast cancer, while the most frequent barrier to mammography screening was that the participants believed they did not have any symptoms (28.6%), followed by 22.1% of them who did not want to know if they had breast cancer.ConclusionThe findings of this study highlighted the low mammography uptake among Palestinian women despite the adequate knowledge of those women and the fully accessible and free screening programme. Hence, interventional strategies should be implemented at several levels to enhance mammogram uptake.  相似文献   
99.
100.
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