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   11859篇
  免费   1014篇
  国内免费   96篇
耳鼻咽喉   13篇
儿科学   89篇
妇产科学   923篇
基础医学   812篇
口腔科学   101篇
临床医学   1687篇
内科学   1357篇
皮肤病学   140篇
神经病学   338篇
特种医学   136篇
外国民族医学   1篇
外科学   980篇
综合类   1252篇
现状与发展   3篇
一般理论   2篇
预防医学   3649篇
眼科学   15篇
药学   706篇
  13篇
中国医学   128篇
肿瘤学   624篇
  2024年   20篇
  2023年   193篇
  2022年   261篇
  2021年   521篇
  2020年   541篇
  2019年   506篇
  2018年   467篇
  2017年   467篇
  2016年   520篇
  2015年   392篇
  2014年   731篇
  2013年   1388篇
  2012年   720篇
  2011年   723篇
  2010年   587篇
  2009年   573篇
  2008年   558篇
  2007年   522篇
  2006年   440篇
  2005年   406篇
  2004年   351篇
  2003年   307篇
  2002年   266篇
  2001年   251篇
  2000年   215篇
  1999年   157篇
  1998年   156篇
  1997年   140篇
  1996年   103篇
  1995年   65篇
  1994年   58篇
  1993年   42篇
  1992年   43篇
  1991年   39篇
  1990年   30篇
  1989年   20篇
  1988年   20篇
  1987年   28篇
  1986年   14篇
  1985年   22篇
  1984年   26篇
  1983年   16篇
  1982年   9篇
  1981年   13篇
  1980年   8篇
  1979年   9篇
  1978年   5篇
  1977年   10篇
  1976年   6篇
  1967年   2篇
排序方式: 共有10000条查询结果,搜索用时 31 毫秒
11.
12.
To increase the overall rate of breastfeeding initiation and duration, factors involved in a mother's decision to breastfeed must be identified. Self‐objectification in the context of breastfeeding was a concept selected for exploring factors associated with negative views of breastfeeding. A concept analysis following the eight‐step Walker & Avant method provides clarity and context to the concept of self‐objectification in the context of breastfeeding. The antecedents of self‐objectification in the context of breastfeeding include living in a culture of sexualization and objectification of women and the internalization of the values of objectification. Attributes of self‐objectification in the context of breastfeeding are a prioritization of physical appearance attributes of the breast over the health benefits of breastfeeding and a preoccupation with physical appearance. Consequences include negative views toward breastfeeding initiation, duration, and public breastfeeding. A concept analysis on self‐objectification in the context of breastfeeding will provide definition and clarity to this phenomenon, lend to theory and measurement, and add literature to the sociocultural factors impacting breastfeeding decisions.  相似文献   
13.
PurposeThe aim of this study was to determine how female age at the end of the reproductive spectrum effects success of natural cycle intrauterine insemination (IUI) or IUI in combination with ovarian stimulation.MethodsWe performed a retrospective cohort study of women 43 years of age and older at the time of IUI in a single academic fertility center between January 2011 and March 2018. Primary outcomes were both pregnancies and live births per cycle of IUI. Data are presented as percentage or mean ± SD. Fisher exact and chi-squared analyses were performed.ResultsThere were 9334 IUI cycles conducted during the study period. Of these cycles, 325 IUIs (3.5%) were for women aged 43 years and over at the time of insemination (43.6 ± 0.8, range 43 to 47 years). Analysis of these 325 IUI cycles revealed 5 biochemical pregnancies (1.5%) and only 1 live birth (0.3%). The pregnancy rate did not differ between IUIs using donor sperm (N = 1/49, 2.0%) compared to IUIs with partner sperm (N = 4/276, 1.4%). The pregnancy rate did not differ between IUIs with gonadotropins (N = 2/211, 0.9%), clomiphene or letrozole (N = 2/78, 2.6%), or natural cycle (N = 1/36, 2.8%).ConclusionsThe use of intrauterine inseminations in women 43 years of age and older is an ineffective treatment strategy. This is irrespective of the use of ovarian stimulation or donor sperm. Costly gonadotropin injections did not increase the chance of pregnancy nor did oral medication when compared to natural cycle IUIs.  相似文献   
14.
15.
16.
17.
18.
目的研究地中海贫血孕妇实施产科综合护理模式的护理配合措施及效果。方法选择78例于我院检查地中海贫血孕妇,纳入时间为2017年5月-2018年5月,采用随机数字表法将其分为综合护理组与对照组,每组均39例。其中对照组采用常规护理形式,综合护理组行产科综合护理模式,对比综合护理组与对照组护理前后心理状态评估指标及家属的护理满意度。结果护理前综合护理组与对照组患者心理状态评估指标差异无统计学意义(P>0.05),与对照组(76.92%)相比,护理后综合护理组焦虑指标、抑郁指标更低,综合护理组孕妇及家属的护理满意度(94.87%)较高(P<0.05)。结论通过综合护理模式可提升地中海贫血孕妇护理满意度,并改善其心理状态。  相似文献   
19.
20.
This study qualitatively examined factors that influenced contraceptive choices in a sample of young, HIV-infected women. Individual qualitative interviews were conducted among 30 vertically and horizontally HIV-infected women (= 26 African American) from the ages of 14 to 24 years (Mean age = 20.9 years). We recruited sample groups with the following characteristics: (a) current contraceptive/condom use with ≥1 child (= 11); (b) current contraceptive/condom use with no children (= 12); and (c) no current contraceptive/condom use with no children (= 7). A semi-structured interview guide was used to ask participants about factors influencing past and current contraceptive choices. Individual interviews were digitally recorded and transcribed verbatim; analyses to identify core themes were informed by the Grounded Theoretical approach. Young, HIV-infected women did not identify their HIV serostatus or disease-related concerns as influential in their contraceptive decisions. However, they reported that recommendations from health-care providers and input from family and friends influenced their contraceptive choices. They also considered a particular method’s advantages (e.g., menstrual cycle improvements) and disadvantages (e.g., increased pill burden) when selecting a method. Findings suggested that HIV-infected young women’s contraceptive decisions were influenced by factors other than those related to their infection.  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