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   57428篇
  免费   3047篇
  国内免费   426篇
耳鼻咽喉   599篇
儿科学   1180篇
妇产科学   1539篇
基础医学   6978篇
口腔科学   2144篇
临床医学   4507篇
内科学   15232篇
皮肤病学   1306篇
神经病学   5334篇
特种医学   1693篇
外国民族医学   3篇
外科学   8572篇
综合类   273篇
一般理论   12篇
预防医学   3080篇
眼科学   933篇
药学   3378篇
中国医学   136篇
肿瘤学   4002篇
  2023年   355篇
  2022年   335篇
  2021年   1572篇
  2020年   956篇
  2019年   1349篇
  2018年   1813篇
  2017年   1209篇
  2016年   1371篇
  2015年   1680篇
  2014年   2256篇
  2013年   2897篇
  2012年   4510篇
  2011年   4412篇
  2010年   2502篇
  2009年   2193篇
  2008年   3749篇
  2007年   3816篇
  2006年   3612篇
  2005年   3597篇
  2004年   3249篇
  2003年   2893篇
  2002年   2584篇
  2001年   734篇
  2000年   668篇
  1999年   638篇
  1998年   386篇
  1997年   352篇
  1996年   318篇
  1995年   375篇
  1994年   324篇
  1993年   244篇
  1992年   434篇
  1991年   339篇
  1990年   326篇
  1989年   273篇
  1988年   224篇
  1987年   205篇
  1986年   231篇
  1985年   214篇
  1984年   178篇
  1983年   137篇
  1982年   136篇
  1981年   109篇
  1980年   107篇
  1979年   119篇
  1978年   86篇
  1977年   77篇
  1974年   73篇
  1973年   72篇
  1972年   75篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
81.
82.
The CAV-AEP annually publishes the immunisation schedule considered optimal for all children and adolescent resident in Spain, taking into account the available evidence.The 2 + 1 schedule is recommended (2, 4, and 11 months) with hexavalent vaccines (DTPa-VPI-Hib-HB) and with 13-valent pneumococcal conjugate.A 6-year booster is recommended, preferably with DTPa (if available), with a dose of polio for those who received 2 + 1 schemes, as well as vaccination with Tdpa in adolescents and in each pregnancy, preferably between 27 and 32 weeks.Rotavirus vaccine should be systematic for all infants.Meningococcal B vaccine, with a 2 + 1 schedule, should be included in routine calendar.In addition to the inclusion of the conjugated tetravalent meningococcal vaccine (MenACWY) at 12 years of age with catch up to 18 years, inclusive, the CAV recommends this vaccine to be also included at 12 months of age, replacing MenC. Likewise, it is recommended in those over 6 weeks of age with risk factors or who travel to countries with a high incidence of these serogroups.Two-dose schedules for triple viral (12 months and 3-4 years) and varicella (15 months and 3-4 years) will be used. The second dose could be applied as a tetraviral vaccine.Universal systematic vaccination against HPV is recommended, regardless of gender, preferably at 12 years, and greater effort should be made to improve coverage. The 9 genotype extends coverage for both genders.  相似文献   
83.
84.
85.
86.
IntroductionPeople with Down syndrome (DS) have high respiratory morbidity, evaluating their respiratory health with standardized, objective tests is desirable. Thus, the objective of this study was to evaluate the technical quality of Pulmonary Function Tests (PFTs) to determine which ones are most suitable for this population.MethodsParticipants included children, teenagers and adults with DS, 5 years of age or older (n = 302). The technical quality of the impulse oscillometry system (IOS), forced spirometry, lung-diffusing capacity for carbon monoxide (DLCO), and 6-min walk test (6MWT) were analyzed by age group. Capnography and pulse oximetry were included in the study. Technical quality was determined on the basis of current international PFTs standards.ResultsFifty-one percent of participants were males. A total of 184 participants (71%) who completed the IOS fulfilled the quality criteria, while 210 (70%) completed the 6MWT. Performance on forced spirometry and DLCO was poor. All pulse oximetries and 96% percent heart rates obtained had good quality, but exhaled carbon dioxide (PetCO2) and respiratory rate (RR) showed deficient repeatability.ConclusionsIOS appears to be the most reliable instrument for evaluating lung mechanics in individuals with DS.  相似文献   
87.
88.
Background: The importance of conversation partners (CPs) for persons with aphasia (PwA) was recently highlighted. Trained CPs are shown to increase communicative access and improve quality of life. The Kagan scales, i.e., “Measure of skills in Supported Conversation” and “Measure of Participation in Conversation” (the MSC-MPC scales), between PwA and their CPs were designed to assess the communication dyad. The MSC-MPC scales were translated and adapted to Italian in 2015.

Aim: To validate the Italian version of the MSC-MPC scales (I-MSC/MPC) by assessing intra- and inter-rater reliability and concurrent validity.

Methods & Procedures: Thirty-two couples formed by 16 PwA and two CPs (one trained and one untrained) for each PwA were enrolled in the study. Aphasia severity was staged by the Therapy Outcome Measures “Dysphasia” impairment scale. Functional communication and pragmatic abilities were assessed with the I-ASHA-FACS and the Pragmatic Protocol, respectively. The PwA were videotaped while communicating both with trained and untrained CPs. All videotapes were assessed using the I-MSC/MPC scales by one expert speech and language therapist and two trainee speech and language therapists. The Intraclass Correlation Coefficient (ICC) was used to calculate inter- and intra-rater reliability. Correlations between the I-MSC/MPC scales and the aphasia severity, the I-ASHA-FACS, and the Pragmatic Protocol results were calculated by the Spearman’s test. The Mann-Whitney test was used to separate the I-MSC/MPC results obtained by the trained CPs from the untrained CPs.

Outcomes & Results: Inter-rater and intra-rater reliability ICC results were highly significant and strong (ICC > .906, ICC > .978, p < .001, respectively). Significant correlations between the aphasia severity and the I-MSC/MPC scales ranged from moderate to strong (Spearman rho>.487, p < .005). Correlations between the I-MSC and the I-ASHA-FACS domains ranged from moderate to strong (rho >.458, p < .008). Correlation between the I-MPC and the I-ASHA-FACS domains were generally strong (rho > .569, p < .001) while correlations between the I-MSC and the I-ASHA-FACS domains ranged from moderate to strong (rho > .458, p = .008). Pragmatic aspects were shown to be mostly preserved in the PwA. All correlations between the I-MSC/MPC scales and the Pragmatic Protocol were strong (rho >.635, p < .008). The Mann-Whitney test showed significant results for the I-MSC scale (p < .026).

Conclusions: The I-MSC-MPC scales proved to be a valid and reliable instrument to assess the communicative dyad. The I-MSC scale was also used to distinguish trained from untrained CPs. The use of I-MSC-MPC scales is recommended in clinical practice.  相似文献   

89.
The concept of participation was reviewed as a component of children's citizenship in order to promote a programme for Integral Development. A narrative revision of the literature was carried out as well as a group discussion was organized along with the staff of an Integral Care Programme, in order to identify notions of democracy and child citizenship related to care and rearing. Some elements that favoured the child participation and some parenting skills were identified. Among the elements that must be encouraged in children are: the development of emotional, cognitive and communicative skills and promotion of decision-making; among the parent skills development included are: sensitivity and responsivity; establishing routines and participation experiences. It is important to stand out that the identified elements to promote child participation and parental competences should be adapted to every specific cultural context.  相似文献   
90.
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